What wheels will fit my E39?

[crofty1984]

OK, I don't want "bling dub-tooz, innit" or anything, my car (530i sport) has some very nice standard M-Sport wheels that it left the factory with, and I'm very happy with them. But I'd like to get a spare set of wheels to have some winter tyres/snowchains on for when I'm up in the alps. They don't have to be nice, just functional. I was wondering if any other cars had the same PCD, etc. as my car. Maybe Volvo Wheels are cheaper than BMW wheels, etc.

Thanks, Dan