Believe or not, rear projection TVs are still in high demand. These types of TVs are widely available from most electronics manufacturers, such as Sony, Mitsubishi, Panasonic, Toshiba, and Samsung.
One of two things. A reflected image causing `ghosting' in the signal, or your convergence amplifiers have gone bad. (If it's an older three-tube projection set, that's quite common.)
Red, green and blue light sources like a digital front projector make up the image and each path of light bounces off a mirror. After they bounce off the mirror, they hit a screen that shows the...
amazon.com sells almost everything, including rear projection tvs. They do not have a very large selection and it would probably be in your best interest to go into a smaller store with support staff...