Not really, especially considering how much a typical stainless system goes for in Japan. Go to any exhaust shop you want & ask them to replicate a twin stainless mandrel bent system, with stainless muffler & resonator & see how much you'll be spending. Considering the muffler alone will be over $100, the piping will be ~ $250 for that amount of stainless, and another $100 for the resonator, another $40 for stainless flanges...and this is just for the raw materials. The only way 99% of exhaust places can do the bends would be to section pre-bent or make their own by sectioning straight lengths...a mandrel bender is a VERY expensive machine, and compression bends (what most shops use) will restrict your flow. You will be raped for the labor cost.
Of course, DIY is the best way to go, to keep cost down...but not everyone has the time/ability to do this, so you pay. One way or the other...