Does anyone know if this part is sold individually?

I was making some improvements to some switches on a scale 1/24 model hydraulic kit already installed in the model. When i was done making those improvements I tested things and noticed a weird noise coming from one of the motors in the chassis. When I opened the model up to look inside I noticed the plastic piece was coming off. I put it back in its place but noticed it was torn. I took it off and used a super glue type of adhesive used on photo etching metal parts and plastics. After letting the glue dry I put that plastic piece back on but it kept coming off. My question is do they individually sell the plastic piece I drew in black and circled in red? Here's a picture.

http://files.automotiveforums.com/gallery/watermark.php?file=502/353039locsters_1854_2269033.jpg

Im wondering if i can buy the plastic piece alone or will I have to buy the entire motor? Or does anyone know what other alternative i can try to fix that piece? The motor is similar sized to those sold in Hoppin Hydros' dancing kit. Its for 1/24 or 1/25 scale models and small enough to keep the car's interior. I posted a thread similar to this one in the plastic models section and they thought it was more of an R/C question. Oreo? Im not familiar with R/C cars. I thought the motors used in R/Cs were much bigger.

As always, thank you for taking a moment of your time to read and/or participate in my thread.

I wonder if some type of two part epoxy or plastic cement would do it.

Yes sir, check Radio Shack, or a hobby store..

Its called a pinion gear.. just show them the motor and ask if they have a pinion gear for it..