I've heard a lot of good about these guys:

http://vdorepair.com/

I need to get this done on my 540i soon too.

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01 X5 4.4 (sold), 99 Toyota Land Cruiser, 08 Ram 1500 Quad cab 4wd 6-Speed Manual, 06 Prius, 12 Camry SE.

"An armed society is a polite society"