RE: Cox Engine Supplies
The only other adapter I know of that works like it should besides the Galbreath setup, was from a guy in Australia, he sold them on Ebay. Hobblers is his user name there. They work as good as a standard glow head, uses a standard or short (fox) glow plug. We have one in use here on a trainer, works like it should. They were talked about here before, check for them.
And hollerp89, if I find or see anything I will let you know, I know finding parts is not a lot of fun at times. I would consider getting another Cox .09 engine with the throttle sleeve on it, say Ebay. That way, the parts are there, along with the spares. May be the most cost effective way to go.