ORIGINAL: Missileman
You know what?
In a way there is. The Zenoah G20 is a 60 size gas engine.
I am not sure but I bet it would work on a 60 size trainer.
http://www.horizonhobby.com/Products...rodId=ZENE20EI
Since you can't get nitro fuel perhaps, if you can afford it, this could be a way to go.
I'm not familiar with Zenoah but I would assume that G20 would be for a 20cc engine where as a .61 engine is 10cc...Rog