I have a Garmin Edge 705 and today I broke my 4th mount while taking the unit off the bike after today's ride. I'd like to be ale to convert the current mounting system to the newer 1/4 turn mounts of the newer 800 and 810. Does anyone know if there is an adapter that is for sale that would allow me to do that? I currently mount mind on the stem and that is just fine with me.

Thanks