I got mine at the hobby shop in Jacksonville. My local shop doesn't have them. According to bladecprepair the part # for the motor is GW/EDP-50H. The prop is a 3" push-on prop with for 1.5 mm shaft.

You can see what the pinion puller looks like here http://www.lynxmotion.com/Product.as...&CategoryID=71 Most shops carry this because you use the same one for cars and planes. The hard part is finding someone who has separate pinions. The more expensive choppers usually come with different size pinions as part of the kit, so larger pinions are more common.

As far as pushing them back on, I use a rubber mallet or pair of pliers.