I have a set of H&R sport spring for sale that came out of an e90 M3 but it will fit the e92 M3 too. The first pic is my M3 with the springs on, the last 2 are the springs after uninstall.
Also have some other parts for sale, check out my other thread:
http://www.m3post.com/forums/showthread.php?t=644103
SOLD