Just because I have never heard of one doesn't mean that it doesn't exist, but I wouldn't hold my breath.
What are you looking for? If replacement is the objective, that should not be a problem. If a sportier exhuast note & less restriction is the objective, then you could get a muffler shop to bend you a custom setup.
Check with the local muffler shop & tell them what you are looking for & see what they recommend.
I would recommend a Borla muffler(s)- I believe that JC Whitneys sells universal fit Borlas for about $99, w/ custom bent or adopt the pre-bent replacement pipe.
Bill