I might go with a "known" downpipe and then have him custom build a cat-back. There's more to a DP that just welding pipe to a flange.
For about the same $$, I did this 3-inch stainless steel sytem which I am very pleased with. High quality, great sound and everything fit perfectly.
For about the same $$, I did this 3-inch stainless steel sytem which I am very pleased with. High quality, great sound and everything fit perfectly.