Had some Colt and BM bolts that I wanted to switch out for chrome ones. I sent the original carriers & bolts to Accurate Plating and Weaponry at the link below. They bead blasted and hard chome plated (in matte finish) the Carriers and bolts, for $35 each.
They also chromed and accurized a Springfield Armory 1911A-1 for me. Outstanding work and awesome finish!!!