I dealt with Keith on the phone recently, I bought BBS wheels w/ PSS used on here, from
MTreeGuy. They needed hub rings to fit the M3 - called TireRack and asked for Keith.
He really knew his stuff, found me the correct hub rings from BBS and sent them to me with the circlips required. Overall a pleasure to deal with!
I'm glad that we have someone from TireRack to help us out, they're a great resource for anything wheel and tire related