Ok, not quite ears, I only have some partial proto plastic ear stuff, that I'm not sure I like. But I did find these dental Prophy heads with NICE 90 degree gearboxes. With the gears from these, I plan on using modified RC Airplane/car servos to move the ears. Heck of allot cheaper than a micro motor.
You can get these gear boxes for 'free' if your nice to your dentist..