A lot of mini buses used the 19.5 rims. They should be easy to come by. Most lo-profile chevy big trucks used them also. Not hard to come by, not really worht any great amount of money. I have been told that they dont fit over the brake drums of some older style trucks. We have looked at changing the rim on our 3600's, to 16.5 or 16" ones. You can get them from any 3/4 ton chevy or gmc from 72 to 84. If you use them, you run acrosst clearance problems in the front axil on the tie rods. I'm going to just remove my orginal centers and reinstall them in a one pc 15" rim. I'm using rims from a impala.
