Cost for re-arching varies: check locally. There's a place in Spokane (Pohl Spring) that wanted $400/pair for that 3 years ago - only game in town, and they're greedy - but I've heard of $150-$200/pair in other areas. Should be something in Archives on the topic. Last set I bought from ESPO was cheaper than re-arching in Spokane, by a bunch, and the car got upgraded Hemi T-bars & then rear springs.
