http://www.amazon.com/Disney-Parks-Trolley-Remote-Control/dp/B008N2766S
I have been curious about this, but to be honest - I have NEVER seen one these anywhere other than online, so without personally seeing its size scalewise or details or comment on the drive or control system, I cannot say what potential they have, but at that price, buy it, let us know. [;)]
Vic:
Got one for my birthday from my daughter. Since she is not on this board, I can say the following. It is a STRONG candidate for kitbashing when, new, just out of the box. Rubber band tires on plastic wheels, not so smooth running, rather loud motor. Three laps around the dinner table top and straight back to the box for addition to “to rework” list. Think “Light Brite”