Yes Rob-- that is what got me onto my search. I ordered an inexpensive transmitter from EBay this morning that does not use a code. I think the best solution is just to try a pair and see if I can get them to sync. I will post back here after I have the chance to test them. If I can get a transmitter/ and earpiece receiver to function, I have no qualms ripping the transmitter apart and integrating it onto a development board. Thanks for your reply!
Foggy