Bob,
You might try contacting Lew Woolard. I sent a Stunt 35 to him with all the pieces you mention except the ABC piston/liner. For not much money, he not only assembled the parts, he also checks fits and clearances (he ended up replacing my P/L), trued up the mounting lugs, polished the venturi, and replaced all the screws with hex head screws.
cheers,
Ken