Just a suggestion... send your request to Vaheh at the internet sales desk instead of going directly to the parts dept. Should be in the $550 range, and once you get a price ask if you can just pick them up to save the shipping as they are heavy (if that is an option for you). You can install them yourself and I bet some folks here would even help you!
Vaheh B.
(714) 835-3171 ext. 2275
[email protected]
Crevier BMW/MINI
Try Pacific BMW if for a comparison quote. They should be right near $550 as well.