You might give RC Connectors a try:
http://www.rc-connectors.com/index.p...index&cPath=80
I've never done business with them, but they list a bunch of adapters for the Parkzone Beast UMX, which I bet uses the same connector. If they don't have exactly what you need, you probably can make your own adapter by by buying something with a male "Parkzone" connector and something with a JST female connector and then splice the wires together (left to right one for one). As a minimum, they probably can get you pointed in the right direction ...