Where to buy plastic spur gears

I desperately need plastic spur gears with these specs
0.5 module
8 tooth
bore size 1.9 tight fit
5mm wide
5.7 OD
Can anyone suggest where I might buy such gears and where does one go to have very small plastic gears “reproduced” or “reverse engineered” if that’s the proper term? I need one that would deal with the public, not some company in Japan that has a min order of 10,000 pieces. Thanks so much!