The 3/4 Ton rim is hard to replace. There is an OEM style trailer rim made by Hayes which is workable on the front. I think that a 70s to 80s 8 lug Chev rim will work on the back. There is also a white spoke rim with red and blue pinstrpes that is made for auotomotive use that will fit on the front. The big problem on the front is that the setbackn a modern rim will cause interfeence with the tierod end.
I would try Jim Carters for the rebuild kits.
