I own a ** model 65 diesel. The rear right rim is rotten out to the point of unfixable. I have been trying to find a decent used one but haven't had much luck yet. New one cost like $500 dollars, and i aint spending that kind of money. Its a 6 rail power adjust 14x38.
Have you tried any tractor wrecking yards? I have gotten some stuff for my 65 from the yards. Parts are getting scarce but they are still out there.
There is a seller on Ebay big on tractor parts and great to buy from , seller- tparts22nuk check him out