I mention it every chance I get... THERE IS A MARKET FOR A REPLACEMENT LEFT-SIDE REAR BUMPER SURROUND THAT DELETES THE HOLE FOR THE STOCK LEFT-SIDE PIPE. I don't have the business means to make it happen, but anybody who fabbed even a flush-mount plug that goes in the hole that is an exact match for the factory plastic would have plenty of buyers.
Dual exhasusts are expensive. The only "budget" one for the MS6 is the Magnaflow and from what I've heard, you get what you pay for with that piece. The other production dual exhausts are not cheap when compared with a comparable single-exit, and nobody offers anything in aluminized steel for those of us who don't live in the snow. Plus, with a production piece, you're paying for the engineering of a device that must be built out of small enough pieces that they are economocally mailable.
Any reputable muffler shop should be able to make you a 3" dual stainless catback with whatever universal mufflers you want for under $400. When the time comes, I'll be doing a 3" resonated midpipe, down to dual 2.5" medium length mufflers. If there was a option to delete the left-side surround, I'd go 3" all the way with with a big quiet muffler.