I don't get on here very often, so I didn't know you were looking for an axle. I have 5,or 6 of them. I offered one to Mike Q awhile back for $200. It had all the drums, pivots, and I think even the tie rods. And yes Lou is correct that the front axles were the same I have looked at them. There are only a few things around the front axles that are different, mainly the springs, wheels, and the hubcaps. 

I didn't quite understand what you were trying to say about how sloppy your king pins are. In the owners manual for one of my old trucks it said to jack up the wheel, tighten the wheel bearing, and grab the tire at the top and bottom. Maximum movement AT THE WHEEL is 1/8". Anything more than that the king pins and bushings had to be replaced. Do you have more than that on your newly rebuilt axle? On your steering box many of those old style steering boxes had a tapered and splined sector shaft. The internal worm gear can get worn in the center where it is used the most. Unbolt the pittman arm and turn the steering wheel two revolutions, doesn't really matter which way. Re-bolt the pittman arm and see how much play is in everything now. Note on later boxes there is a section ground into the worm gear or sector shaft that was a "high spot" so there was no slack when you were going straight down the road. Generally this will work on many of the older steering boxes.

As one last cautionary, there was a problem with some of the 1929 steering boxes that as they got older the worm gear would become loose on the steering shaft. Grab your steering wheel spokes and give it a yank straight up toward your chest. If it comes out, or up significantly you have a problem. If it doesn't, you are probably okay. In my opinion this is something you would want to know before it came apart while you were driving. 

Oh one last thing, reach out to Billie Possum and buy a pair of the aluminum brake trunnions to replace the old cracked pot metal ones that are probably on your front brakes now. Another part you don't want to fail at a bad time. 

@arthur-p-sell Thanks Arthur for your reply message.  Sorry I didn't get back sooner, been out of touch with every thing due to medical.

So,  originally, my steering wheel play was about 5-1/2 inches or more.  Scary to drive on curves.  When I jacked up my front end and grabbed the passenger tire at 12 and 6 o-clock with my hands, I could rock the tire/wheel assembly inward and outward from the engine bay with a movement of say 1-1/2 inch or better at the top and bottom edge of the tire respectively.  I agree with your comment, it should be no more than 1/8 inch movement in this process.  When I went to the driver side wheel, to check its possible movement, I found the drivers side wheel rocked about 3/4 inch or slightly more.

That indicated the King Pins were seriously worn and needed replacement.  Upon my delivery of the front axle to the local repair shop, we discovered the wear of the existing worn king pin and bearing on the passenger side deteriorated some of the outer wall of the axle material that when the repair shop were to try and ream and straighten out the alignment for the installation of the new bearing and king pin, the repair shop was not feeling good about doing the job.  A different size sleeve bearing would need to be installed and due to a larger ream diameter requirement would take away material thickness of the outer axle wall area.  I agreed.  There was to much damage to the old axle to take a chance. 

So, amazingly, within a couple of hours, which included my trip to and from the repair shop, I found a new, but old, axle which had the same casting number.  I didn't expect that quickness.  Yeah, it had some surface rusting from over the years of storage.  But I used 5 percent vinegar, on paper towels, then covered the paper towels with the wife's kitchen plastic wrap (didn't tell her - she'd flip) in order to prevent dry out, and waited 12 hours to reveal the rust dissolvement.  I then did slight toothbrush scrubbing in some of the fine remaining dissolved rust spots, then overall cleaned off the remaining vinegar and coated the axle with the Meuvcol product.  Came out beautifully to my expectations of a very old part.  I didn't previously mention I sold GM, Rolls Royce, Fiat and Renault parts back in the 70's.

After I finished the prep of the axle, I took those pictures and posted due to my amazement of that job (I'm a newbie in this field other than the old hacker who worked in their driveway and street working on engines, tranny's and rear ends, rebuilding, swapping and such).  I should sit down and write out my life story for my grandchildren so they can know what their grandfather did in his early life - maybe, maybe not they want to know.  I've got lots of stories/experiences.  Example, small piece, 1969, late december early january, out on the street, freezing cold and windy, flashlight in and, and yeah a "cherry picker" as we called it, and some tools, swapping out a chevy 307 with a 65 327, I'm under fiddeling with passenger side motor mount and the bolt is giving me grief, won't go in, and the wind is gushing under the car and my long hippy hair gets "welded" to the ice on the street surface.  Once the bolt goes in and I finish tightening it up, I can't get out from under the car.  Had to wait for my brother to came out, he was cold waiting and went in for warmth, and I thought I was going to have to cut my hair to get out from under.  He got me a towel to help my body heat to release my hair.  That's one memory that still sticks with me after all these years.  Now I'm practically bald and have no care about hair.  My grand kids could never picture me with that experience.  Sorry about all this - I'm bored waiting for Aug 1st (hopefully).

I too, will be reviewing all of my front end parts for possible wear and if need be, any rust conditions that I can apply similar to what I did with this axle.  As many members have stated, there are other members with either available parts for my 29 or even directions to lead me to find parts, such as yourself.

At this time, due to medical, I am not allowed to work on or go under my truck (uurrgggg) and will need to put the front end back together, in which I will be inspecting those parts in that process.  And if needed, will make contact with those individuals who may have what I will need for replacement.  AND, after all this on just the axle,  I am expecting it's my steering box that's causing the majority of my steering wheel play.  That I'm really looking forward to getting my hands into.

VCCA members, such as yourself, are amazing and everyone i greatly appreciated.

G