I bought some 3" mandrel bent pipe and a 3" x-pipefrom this guy (Ubendman) on ebay a couple years ago. I just did a search and he is still on ebay.
Mandrel Bent Pipe
I called him up and he is real easy to talk to and seems to be a pretty nice guy. I had him make 4 bends in 3" pipe with XX amount of pipe before and aft plus the 3" x-pipe I purchased on ebay. The grand total was $110 shipped
from New York to California. Bob's Muffler (15 miles from me) wanted $40 per bend and seemed like an A** (or he had something stuck up it) when I talked to him on the phone. Several other's I've talked to have had the same experience with him.
Here's a link to Ubendman's website: