They used to come from Borla with two sets of pipes from the cat to the resonator. One for the manual, and one for the auto, although I'm not sure why they didn't just make one set that fit both. You can cut your stock pipes off of the resonator and use them. For the 3.2, they are 2" diameter, and so is the Borla, all the way to the mufflers.
If that doesn't work, I still have a set for the auto I might let go for cheap, since I installed the set for my manual 5 speed.