You will save a lot of money if you...

Plan out what bends your going to need.
Buy mandrel jbends online or a&e etc...
Cut the pipes, and mark them up for welding.
Take them to a welder and have them welded for close to nothing.

Not many local shops specialize in fmic piping.
Glen at Hybrid tuning does custom fab work.
I believe sidewinder dsm's do that type of work also.

I am sure other shops do it, but they don't usually do it as a primary source of business.

Good Luck.