Yes, OEM. I know IND carries them but you could also shop around at one of the dealers that sells parts at a discount on this forum...
Here is Tischer offering the parts... http://www.m3post.com/forums/showthread.php?t=611532
Current: 2011 Space Grey E90 M3, DCT, Comp. Pkg., Conv. Pkg., everything but Cold Weather Pkg!
Gone: 2008 550, Space Grey, Sports Package, Sport Auto Transmission.
Sold: 2004 545i (U.S.), Steptronic, Silver Gray.