I should shortly have the 34.9mm top pull m900 front mech you're after becoming free. I was thinking about shimming it down to 31.8mm, but have decided to just get the correct size and be done with it, freeing it up. It's in excellent condition. Still looking for one?
Rossin Concept MTB 1990 - Full XTR M900
Litespeed Ocoee Titanium MTB 1992 - Grafton / Bullseye / Syncros / XTR
LeMond Z Team Issue SLX 1991 - Full Corsa Record / Sigma
LeMond GAN Team Issue GLX 1993 - Full Dura Ace (7400)