lost my saved liniks: need 3/8 or 1/2 MS flanges and 1-3/4 pipe links

Building a new turbo setup very soon and I lost all my links :(. Where has everyone bought there exhaust flanges and piping? Looking for mild steal as I'm going to have it coated by Jethot or Swain.

JB

My LT1 flanges from PTK were pretty thick (about 1/2"). Wish I could find some more. My 1-3/4" pipe either came locally or from Schoenfeld Headers.

As for coating, I had a set of turbo headers and downpipes coated from Swain and the bill was almost $700! and only coated on the outside. :( My old LTs were like $200 though. I'm using a CE Coatings for the rest of my stuff.
http://www.cecoatings.com