I'd buy one if it were a decent price (under $400)....any more than that and you can get a custom one built for less.
I would want it to be flat flanged to fit regular aftermarket cat back system (not stock donut style - who would want that?)
I have know idea why it is so freakin' hard to get a USDM length twinscroll downpipe.
They are either not the right size (EDO Performance's Tomioka Racing 2.38") or way overpriced (MP's $680 for group buy!

)
Seriosly, WTF?
I just don't understand why a vendor wouldn't jump on the opportunity to make some money......these swaps are becoming more and more popular and there is most certainly a demand.
If I had the resources I'd do it myself.