I just got my 3D printed parts and surprisingly they work! Haha
Backstory: Last year, while riding some single track, I crashed and pushed my rad far enough back to rip the exhaust valve cables right out of the servo motor on my 2007 CR250. This caused some of the internal plastic gearing to strip but no big deal, I ordered up a new servo motor and I'm back in business.
Rebuilt the motor over winter and reassembled the bike, making sure there was NO slack in the exhaust valve cables because I was going for maximum performance haha. Long story short, I must have made them too tight and it ended up stripping some gears inside my new servo motor assembly.
Now I had 2 working servos with stripped gears and I wasn't buying a 3rd one. So I searched for these little gears until I reached the end of the internet, and nothing to be found. I called my geek brother-in-law because he's into computers and model trains, etc so if figured he would know where to get something like this. He suggested modeling them up and using an online 3D printing service to make them. So that's exactly what I did.
Since I'm too stubborn to ask for help, I figured out how to measure up the old gears and then modeled them up using an online CAD program. I uploaded the 3D file to Shapeways, selected the material closest to what RC gears are made out of and voila, 2 weeks later I have my parts! All for $20 
The gears arrived yesterday. I made a small mistake on 3D drawing and didn't make the bore go all the way through on either gear so I had to run a drill bit through to open it up. I assembled the servo and tested it with a 9V battery. Everything seems to be working, now to field test it!
