Anyone have a rusty 2 stroke muffler to sell? or....where can I buy a new one??

I recently bought a vintage bike with a Tiger 2 stroke engine. The previous owner cut the muffler apart and created a baffle-less expansion chamber---its way too loud.

Any suggestions on where I can buy a stock muffler (preferably old and rusty or Black,...Would really prefer to find a very rusty old one)

Brian in Austin