the motors in eggs and revvies are radio control servos... any online model shop and order one, u need othe dimensions ... 40mm x 37mm x 20mm and you just need a standard servo, it should work, theyre about a tenner, and all you need to do is chop off the excess wires and just use the red and white power leads on them, you may need to take the new connector off of the new motor and put the old one from your old egg onto the new servo, as the connectors are sometimes different, hope this helps ...