Can build a custom whatever you want. Buy a cat, buy a muffler, and walk into an exhaust shop. $200 later, you've got your custom exhaust.
$200 after you buy the stuff or with the stuff??? well I could build him one for $50 labor, and whatever parts he wants or doesnt want to supply... I have tubing waiting, getting some flanges soon, I can get the muffler in a pinch... it all comes down to more then I want an exhaust but no fart cans.. well.. you want loud, quiet but rumbles when on it, quiet full stop, is hte car turbo or NA, 3in or 2.5in?? still sooooo many details that arent obvious...
Go with a Prodrive. That is what I have! Looks stock and has no drone! It is only an axle back until you mate it up with a turbo back.
If you can find one I was looking forever for one, then just settled with my Stromung axle back. I do love it though!
