exhaust parts for my integra?

I have an itegra with a tenzo muffler, i got the muffler really cheap from a friend and i had another friend weld it on. After a heavily salted new england winter my exhaust pipes have rusted out pretty bad from the cat back. I would really like to get a whole cat back exhaust without muffler, but no one seams to carry this kind of thing if anyone knows where I could get the parts or something similar I would appreciate it.
Chris