I bought a nice little 12 volt RF transmitter/receiver package not realising the DIP is latching. The momentary DIP is PT2272M4, made by Princeton electronics. There are a bazillion in the hands of big distributors, I found at retail one in England, one on ebay where I don't do business. Does anyone know where I can find this, an equivalant, or an inexpensive 12 volt RF transmitter/receiver with relay for momentary contact use? For up to 100' max type use out of an automobile.