I picked up 3 of these engines in an engine lot auction off Evilbay some months back.. I couldnt find parts for 1 the other 2 were brand new never ran. I contacted several hobby shops that I go to often and they couldnt help me find parts on line. I then contacted OS Engines and got the parts I needed for the motor that wasnt running. They should be able to help you..
I would consider selling both NEW engines or all 3 make me an offer.. If not try your luck with OS..