I think Chevy (and I guess some other GM cars) are 5x120.65, close to the BMW pattern but I don't know if they'd bolt on. Special "wobble" logs can be purchased that will allow fitment. No other cars use 5x120 AFAIK.
Given the wide selection of various BMW wheels though, I bet a quick look on craigslist would turn up some rollers for $100 or so. E12, E24, E28, E34 should all work.