I am building 2 ARFs with the RCGF and Saito 2 cylinder engines (60 and 57 cc). I need to find internal canister mufflers for the interior tunnels. I can't find the muffler or related plumbing for twin exhaust headers, rear dump exhaust and smoke. Does anyone have any suggestions? P.S. The planes are an Aeroworks Edge 540 50cc and an Aerobeezs Extra 330SC. Rick