Here is a robotic 360 Pan and 180 Tilt System with a large top platform for mounting your camera that has 360+ degrees of pan and 180+ degrees of tilt capabilities. It is powered by servos which can be controlled using a standard RC or microcontroller.
This has aluminum brackets and housing. The unit weighs 2.6 lbs. You get two HS-785 sail winch servos to move your camera. More info is available here.