There are four upholstered seat buttons on the bench seat. The top has come off of one of them and it is gone. Where can I buy a replacement button. I think there is a little extra fabric on the back side of the metal trim plates. I could use this for covering but need a button to make it work. Grant

Most upholstery supply houses will have buttons. You can also try sewing stores and hobby stores particularly the arts/crafts type.