Yes, Spinwerks will do anything from 3" bolt circle out to a 6" bolt circle, four, five, and six lug providing they all fit. The wheels are reasonably priced around $210 to $240 each, weight 11.2 lbs (for the 15x7s) and the 15x6 should be a tiny bit less.

TrackSpeed sounds like a much less expensive and almost as light option if they'll make the four on 108 setup.