I recently got the new GoPro Hero 3, along with it i got a lot of the accessories, chesty chest mount, handlebar mount, and all of the 3m sticky ones. i wanted to be able to use my old camera on those mounts too. I'm sure someone sells some sort of adapter or something but i thought it would be easier to just make one. so that's just what i did.
-longer GoPro attachment/arm thingy
-bolt that screws into your camera your camera
-3 nuts that fit that bolt