you can order wheels that are 18 inch just like mine (they are BMW replica style 220M) for around $1000- for the set and Michelin winter ICE snow tires from Tire Rack.
I found my rims last year in Toronto some fellow ordered 2 sets and ended up only needing one set (guess his girlfriend left him). I was lucky I found the rims and picked them up. All in all with the tires I think I spend $2,400- not bad when you compare the OEM cost around $3,400- to $3,999- plus tax.
Check around also Google for wheels you might find some near you ...
Last edited by Mr. ///M3 RD; 06-12-2012 at 04:29 PM.