What will work on e36 is porsche 966 non turbo with adaptors from http://www.rallyroad.net
The callipers are hard to find and not cheap but think i seen a black set on adverts, got mine from there but in red, most VAG guys use them as an upgrade too.
I know on the e46 there are 2 ways to go I'm going with full m3 front and CSL discs and 18 inch wheels and the back can be done too, not sure about the rears on the e36.