I suggest you post the year and model of the vehicle you are working on.  If it's a 32 I have some that I repaired locally- not vulcanized but work fine on my 32.

@steve-d  any help or info contact would be great . It’s a 1932 2 door coach if you want to message me the info great also any photos. Thanks

Info and photos sent.

Here they are  .    These could br re -rubbered .

I just rerubbered the same mounts in the past couple weeks.  I used an oxyacetylene torch to heat one side so I could roll back the tab that captures the center piece. I wrapped 3/16” rubber around the wings of the center piece and then rolled the tab back into place cold, using my vice. The engine is not back in the truck yet so I can’t tell you how they’ll perform.  I was unsure of the density of the rubber in the original mounts.

@michael-falise Thanks for photo and information.