Have you got a laptop? If so, you could use Bluetooth to control the robot. It would be possible to use a PC joystick for control, and view the image from the camera on the laptops screen. You would need a Bluetooth transmiiter card plugged into the laptop, and a reciever in the robot. However, you would have to write your own software to control everything. Ive got no idea how much it would all cost, though.