Grana has what appears to be - from what's left of the lables - a WindStream generator made by (or at least the controls were made by) Thermax.
The prop blew itself to pieces in a high wind when the unit tipped up (that's its override protection) and the prop banged into the backstay.
I can't find a trace of this unit on the net or in the cataloges I have but maybe someone knows. If not, this weekend I'll get some spruce and make a prop. It's a pretty simple constant pitch non airfoil design so how hard could it be? But I'd rather buy the thing if possible. Whatever, I'm loath to plunk down a grand or more for a new generator.