As suggested you can send it in to Terry at CH and have them put a bosh plug cap on it and that doesnt have the grounding wire.

Both Brillelli and RCIGN will service other engines. Tim explained it pretty well how you can change the sensor yourself if it is fried.

look at http://www.ch-ignitions.com/ for more info on your ignition and contact info if you want to send it in to get a new cap or order a new sensor.