Black or gunmetal wheels on a VO seem to be a rare find (unlike on AW).
Member Frankcos has them:
http://www.1addicts.com/forums/showthread.php?t=538853
Here's another example (a rendering however) to get an idea.
Source:
http://www.bimmerboard.be/index.php?topic=28318.180
Maybe too racy with VO ?