http://www.techtec.de/index.php?lang=en (reading about the E93 here in europe many guys swear by this company not sure if they do ECU tuning if you send it do them)
http://www.wintertuning.de/ (talked about extensively in the 1 seriers forum)
http://translate.google.com/translat...ort-42319.html (Some research I was doing, all the guys in that forum have your motor.)