cant find a 400/yz426 exhaust!!

[yfz3x]

can anybody tell me where i can find an exhaust for the 400/yz426 conversion?ive been looking everywhere,i really didnt want to wait to have someone build one,dont care what kind but would like a tc that i can use a quite core
thanks

[ss440ex]

Use a yz head pipe and the 400ex muffler.
Have an exhaust shop bend ya a intermediate pipe joining them together....

[ss440ex]

Another pic of a muffler and interm pipe I did......