In my area (inland Pacific NW) I've paid about $600 per bumper, and that's with supplying good straight cores. Two companies in Spokane, one is pretty indifferent about his work - if it's flawed, too bad - but the other guy's good.
Last place I used was Ogden in UT: beautiful work, but even more expensive.
Either shop, plan on multiple weeks and taking longer than quoted.
Tri-City sounds pretty good by comparison.