Bimmian sells the aftermarket ones, although I don't think they have the rears for the facelifted sedan yet..I got my OEM set from Bekkers and they fit perfectly.I'd recommend the OEM set.It's well worth the money.
I'm gonna have to chime in on this one and tell everyone to go with OEM. Like they said, perfect fit, and having a BMW part number on there just gives you a nice warm fuzzy feeling of security. I got mine from Maximillian importing for a little over 400...not a regret in the world.
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