Oh, I was going to list http://www.kangkeusa.com as another place to shop. In addition to their SK line of 2-stroke glow engines, they're now selling JBA 2-strokes as well.

I haven't listed resellers for Rossi or RCV, I know they're out there, but I don't remember links off the top of my head. Oh, and Jett engines are frequently mentioned by enthusiasts as well, hopefully someone will provide a link for those as well.