where to buy exhaust?

They have a regular pipe bender.
I asked Jegs when I bought the mufflers, but he said they didn't have a set for the car. But here it is on their site:
JEGS Performance Products 30500: Header-Back Dual 2-1/2 in. Exhaust Kit A-Body | JEGS

Hard to tell from the picture, but the description says it's all mandrel bent.

One reason I don't want to deal with doing it myself is the different headers I have and the 440. I'm not sure how well these kits would line up and fit without some modification.

I might just say screw it and let them do the whole thing. Probably not making enough HP anyway worthy of the smoother bends.