I obtained a 2M pattern plane in a trade and it came with a YS 140L engine installed inverted. The muffler system included a carbon fiber tuned pipe coupled to the engine header using a flexible tube. My question is where can I obtain a replacement tube? The one that was used prior to my trade is leaking exhaust residue. This leak according to the technician at the YS repair facility will affect the idling characteristis of the engine. I sent the engine to be inspected by the same facility and I'm awaiting its' return however I don't want to install it before I replace this tubing unit.