Looking for filament supplier gear for UP!?

Reprapers,
I have been looking online for the filament supplier gear with no luck. Does anybody know of a similar gear as this one for a 3mm d shaped shaft? Could this possibly be custom made for this application. I would think this gear is used in other application but cannot find a source. Possibly for moving raw materials in an assembly line or moving fabric?

[www.thingiverse.com]

I have been able to find a motor that I think matches close to this on and I have the switch ( Thanks TeamYeamUSA) all I'm missing is the gear.

Thanks for the help,
Mark F

The motor spec'd on this page has the gear already attached but its 8mm instead of 6mm. It sells for ~$17 but I know I've seen it somewhere else for closer to ~$5-$6.

[www.thingiverse.com]

I think you can order one from a machine shop.