Originally posted by AWOLsoldier
The material i have is 2.5mm thick and it's flat and true and i don't expect it to warp any time soon. It works well for a setup board but i just use it as a flat surface for now because it's pretty. 
I have to dig through my emails to find out where it comes from, i'll get back to you on that.
If your looking for CF sheets check this place out:
http://www.robotcombat.com/marketplace_carbonfiber.html
and they have colored sheets available as well...