I had the same idea and back in Jan. 2008 I put a ticket in at GRE. A "Jack" e-mailed back and said 'that the 500 and 600 are well suited for re-head devices, but at this time they do not have any plans to produce one. However, he said, the door is wide open for any third party manufacturer to create such a product. He also said he thought it was agood idea and he would bring it up with their engineering and management.' I really would like to have one too, and would purchase it was reasonably priced. It might be if a number of people would contact GRE and express their interest in getting a remote head, they might decide to manufacture one. ARE THERE ANY OTHER GRE 500/600 OWNERS OUT THERE THAT WOULD BE INTERESTED IN A REMOTE HEAD FOR THEIR RADIO?