I personally use Bimmer Specialist. Tons of OEM parts and they ship out of LA. I have great things to say about their customer service. They check your order and cross reference the part numbers to make sure your not ordering the wrong part, or if you order something and their is a second part that goes with it, but you forgot they will email you first. They did this for me when i was ordering parts for my E36 and threw on parts for a friends E46. They emailed me saying the parts i ordered werent correct for my car, and i replied and explained it was for an E46. Thats pretty good customer service IMO. That and they appear to be priced quite well, with the cheapest shipping i have seen.