RE: 80
R21,
Hobby People offers the Mark gas engines; made by the folks who originally made the Moki engines sold in America according to the Mark website. They are currently not in stock. I have thought about the engines before when trying to make a decision on what to buy. They look like they would fit very well in a slim nose plane. Hobby People also offers a backplate/radial mount and mufflers that would fit well in a cowl.
I have not come across any forum posts by people who own one. If you locate one and install it in a plane, please post it. It would be a great thread.
Evolution also offers gas engines with the same carb/muffler location on the engine.
Brian