Muffler source for A6

[John Naitove]

My muffler is starting to go on my 95 A6Qa with 70k miles. First, is the
muffler stainless and if so, isn't that pretty low mileage for it to
fail? Second, if it is stainless, do I replace it with a stainless one
and are there a non-factory ones available? Finally, where is a good
mailorder place to get a stainless or non-stainless one or a good
muffler/exhaust place in the NY Metro area (near Westchester)? BTW, I am
not looking for any additional noise commonly inherent with "sport"
mufflers.