There's a guy in Orange County, Son Tran. He repaired some cosmetic wheel damage on my wife's E92 a few years ago. I know Son is still in this business and he is highly recommended by BMW folks here. Just google Son Tran and wheel repair and you will read a lot about the work he does.
2013 BMW X5 35i
Alpine White | Cinnamon Brown | M Sport
2013 BMW 550i
Titanium Silver | Black | M Sport