Pololu - 30:1 Metal Gearmotor 37Dx52L mm 12V (Helical Pinion),Pololu - 30:1 Metal Gearmotor 37Dx52L mm 12V with 64 CPR Encoder (No End Cap),For 1968-1974 American Motors Javelin Timing Set Cloyes 33792YK 1969 1970 1971 | eBay,Thomas & Friends Motorised Trackmaster MetalEngine Henry James Gordon Percy Kenj | eBay,30:1 Metal Gearmotor 37Dx52L mm 12V (Helical Pinion)