Call the smaller shops around the area and ask if they do custom exhaust work, in other words bend their own pipe. The shops that just install pre-bent pipes aren't going to be able to help you. Or look for a specialist, around here there is a shop called "The Wonderful Muffler Man" (not a chain AFAIK) that can do anything you want.

Get a 17748 for 2.5" pipe or 17747 for 2.25" pipe...I suggest 2.25" for your situation.