Have you called Staintine direct?? I once wanted a muffler for my XT660Z Tenere and was told by all dealers "they don't make them anymore" so I decided to phone direct. The fella I spoke to said "yeah of course we can still make one, we've still got a jig for every pipe we've ever made!!." He did say that rare order may need a few weeks lead time as they would need to dig out the jig and do a one off but that was the only condition, pretty sure pricing was just the same as modern equivalent, $400-$500 from memory.