@Suncross
www.nichecycle.com I bought the muffler there - delivery was fast, but I still have to pick up the pipe, so can't say much about the quality.
@geezer
I'm so with you on messing with an exhaust, carb, jet, filter. It's a bitch to tune it up, it took me a day or so to get what I wanted and that was without a muffler ...