Homebrew PCBs

Can any one recommend a supplier for FR-3 (paper-reinforced epoxy) boards in 
Canada?  I spent a while poking at the website, but I don't think digikey 
carries them.

I'm looking for paper-reinforced epoxy since I've got this cnc-converted mill 
and I was reading that I should stay away from glass-epoxy boards.

Also, what are the guidelines on board thickness and copper thickness?  Do 
people typically use 1oz copper 1/6" thick boards for most projects?  (I'm 
building stepper controller circuits.)

Regards,
Sebastien Bailard
RepRap.org - self-reinforcing 3D printer project.
p.s.  For people interested in building a RepRap, I've got a forum up here:
http://sebastien.webfactional.com/forum
If it takes off, we'll move it onto the main site and make it official.