70 Duster Stock Replacement System - any recommendations where to buy?

I've got a stock 70 Duster 340, 4-speed. Stock HP manifolds Casting #'s 2863553 (left) and 2863549 (right). I'm looking for a complete stock exhaust system that I can bolt-on and not have clearance problems. I called Accurate LTD but they want $600 plus $120 shipping - way too rich for my blood. I thought about going to a local Midas or Monro shop but they won't even venture a rough estimate over the phone - and I don't feel like trailering the car around town to find out (unless somebody has had good experience with them)...

Has anyone bought one that fit without breaking the bank?

Thanks...