Try Turk Brothers, I have been using them for the last 3 years and they have the best prices around on wheels. I get my RR and LR wheels from them. The offsets are not the same as what you get at the track but for 19-25 per wheel for polished, I can live with that. I also like the Van K wheels much better than the Douglas and they are always in stock and available.
http://www.tbrwins.com/catsearch/frsearch.mgi