Take a 1" wide 3" long piece of thin metal and drill a 5/16th hole near one end. Bend the metal into a U shape. Buy a bolt that threads into the game tracker(bolt may be metric) and then attach that bolt thru the hole using a lock nut leaving about 3/4" of the bolt sticking out of the hole. Screw your game tracker on.
I tape that holder onto my recurve where the bushing would have been installed. I also put some mole skin on the metal where it touches the bow so it doesn't scratch the bow. Works great and its very cheap to make.