So now you have a digital proportional transmitter, receiver, ESC (electronic speed control) and servo to transplant. I have used 1/10 scale servos, there larger, (basicly the same size as the tyco one) stronger and cheap to find at the local hobby shop. But you can can use the pro-pulse one if you want.
As far as the motor, take it out and bring it with you to your local hobby store. Ask for a mild motor of the same size (380?). Also have them try to match up the pinion gear. The factory tyco gear will be pressed on, the new gear will be held on by a allen head set screw. The tyco gear can be removed, but it's possible to damage the old motor and new motor if your not care full. Dont buy too crazy of a motor, the gears have enough trouble with the stock motor.
Most ESC, even ones for 1/18th scale should beable to handle any motor you can find in a 380. You'll strip out gears before you wreck a hobby grade ESC.