Hmm, not sure. Here are some pics--not great ones. There is one rod that travels from the throttle control to the governor (low side) and one from governor to carb (high side). There is a spring on the throttle, too. These are impossible to find. Joe51 has made these assemblies and might have extra rods.
if you have a hobby store close that deals with rc planes they should carry small steel rods and Z bend pliers..I made my own rods for a few engines..I also made my own return spring that goes around the one arm.. For the long rod that goes side to side I used an old metal coat hanger since they are thicker and fit the holes in the arms tighter..