As I understand it, "M-Technic" simply means original parts as designed by BMW's ///M division. So these are the standard parts you would buy for your ///M car. Many of them (most notably suspension and body parts) can be substituted readily to make the more pedestrian Bimmers go faster around the track, etc.
BMA can order anything BMW and they seem to have the best prices (sometimes even better if you call them).
http://www.bmaparts.com/cgi-bin/home.php
Originally Posted by 1992 BMW 535i