If you dont have any luck here you could always try over at
http://www.318ti.org, they have good info for M42 and M44 cars based around compacts though.
I believe you could get a set of Schrick Cams if your cashed up. Also Cat Cams do M44 and M42 cams.
Don't try and fit M42 cams to the M44, They are different in a big way.
Hope this helps.
Cristian