carryall jerry:
Sorry to hear about your issues. Take the muffler off and take it to your local auto parts store or full-service muffler shop. They will have what you need or be able to identify it for you. Per your description, it sounds like a glass pack or Cherry Bomb. There are many look-alike mufflers on the market and you should be able to find one that fits your application.
Good luck with your project.
Tony
