Here's an example of 20x9 and 20x10.5. Not too sure of his offsets, but using his photo as a reference, you should be able to get that set to fit. What are your current wheels specs?
http://x3.xbimmers.com/forums/showthread.php?t=696704
Style 87
20x9.5 ET45
20x10.5 ET30
Sales @ UPWheels.com *
Ph. 657.888.4UPW * FacebookDOTcom/UPWheels