Good Luck!!!
Hey, I wish you luck trying to find parts for that engine. I tried everywhere, and everyone, and no one had anything. I had the same exact setup you have...and I was able to swap parts, and the motor ran, but I was not confident enough to use it for anything more than practice. I actually gave away two brand new pistons and sleeves because I could not get a con-rod. jim Hottinger was the person actually modding the Ron Paris motors, and he does not have parts. Thats when I held up my white flag...if the guy who worked with these motors does not have parts then thats it. Oh! Just in case you call OFNA, they don't have parts either; they only import Picco off-road motors, and those internals are completely different. Sorry, to be negative, but I hope this saved you hours of hunting.