I had something like this on my GS to hold my Escort X50/8500.
http://www.cyclegadgets.com/Products/product.asp?Item=APM
I used one of those helmet earphone kits with it and hardwired my RD cord to my battery. Worked like a charm and saved me many, many times. On my S I have the RD mount stuck on the inside of my windscreen and the cable hardwired. I haven't used the RD yet, but only because I haven't done any long trips on this bike. Look around on eBay for some of these gadgets.