http://www.337skymaster.com/messages...1&d=1048456518
Here is a pic from the other thread. It appears to be made of orange cowl seal siliconed around the pitot, with holes drilled for the pitot inputs and two screws. Nothing too high-tech, but there is a thermostat in the circuit as well that will have to be located if you don't have it. The original is out of production, but I'm certain a replacement is easily available as long as the on/off temp of the original part is known.