I'm going to try to get my Supertrapp can (muffler) to quieten down a bit as thats what came with the bike...if no joy I will keep my eyes peeled on here and ebay.
I have a standard exhaust. I brought my TTR brand new and took the exhaust off after 2 hours riding and put it in a box and that is where it has sat since. I am in Brisbane Australia but if you want to PM me maybe we can work something out? I will post up some pictures if you are keen.