Finding 0.8 module gears is not the easiest thing to do.
Pic Design has a stainless steel 0.8 module, 20 tooth, 20 deg.p.a. gear, but it has a 10mm bore: MSG29-20 (although, I could only find it in my hard copy catalog)
Misumi has a stainless steel gear, same specs but with a 6mm bore: GEABS0.8-20
QTC has a carbon steel gear, 6mm bore: SSCP2.5-20
Stock Drive Products has one that may be perfect, with an 8mm bore: S10T08M020S0508
All of these part numbers were found through
www.globalspec.com.
BaneBots won't sell these gears individually?
Andy B.