Yo Don;
I have to say , wheel wise , on the ones I've done the rims have always been the least of my problems . All I can say , is if they are separate from the hubs and wires , Try to find a compatible Thick walled P.V.C. pipe and using a Dremel or aLathe make new rims .Sometimes I've heard those white metal or pot metal ones crumble under even primer after a while .