For those who want more than the standard trailer wheel and have hubs with the 4x100 lug pattern here are a few cars that use that size of pattern if you want to buy cheap stock car wheels from ebay or otherwise. There are some nice aluminum stock wheels out there.
Gearheads please correct me if i'm wrong but I believe all these car rims will fit our 4x100 axles. (that being said, you will probably have width issues using a car rim)
Mazda Miata
BMW 2002 & 3-Series E30
Mini Cooper
Mitsubishi Mirage
Nissan Sentra
Ford Escort
Saturn S Series
Scion XA & XB
Honda Civic
Toyota Prius & MR2