did some googling
http://www.realoem.com/bmw/showparts...=33&fg=30&hl=7
http://www.ecstuning.com/BMW-E90-M3-...83886/ES57594/
that part there
for 04 Camber arm, right 1 33322283886 $81.50
the cheapest price i can actually find for sale is from ECS at the $180 though.