You should check out Scratchbuilder's suggestion to use the Intermountain 3 rail plastic wheel sets. They have the pizza flanges (as well as plastic couplers in the package) and are probably common. I have at least enough to do 12 cars. IM also makes plastic 2 rail wheelsets as well as the metal ones. I replace the plastic 2 rail sets that come with the kits with the metal ones and so probably have 40 sets of the 2 rail plastic.
Allan
