ZAGNUT is right, I made my last mounts out of scrap square aluminum tubing I borrowed from a shop of aluminum doors and windows. Just drill the bolt pattern fror the cranckase cover and a hole for the carb. I mounted the mount to the engine and then the opposite side was bolted to the firewall with 8-32 bolts and blindnuts...very cheap and easy.
I guess I´m lucky too, because 15 minutes from home there is a little machinery shop where i bring the dural ( U$5) and they milled a prop hub, the prop washer and reduce the flying wheel for just U$ 12.00 So I do not spend more than U$20.00 in the conversion.

Oh, the balance of the flying wheel is on me!!! but I have run 2 ryobi with the wheel only reduced and with no balance at all and they run great with almost no vibes.

Sooner I hope to have a lot of pics of my conversions and mounts.

Tato Lazo.