cad/chromate plating

questions for you guys that have had work done zinc and chromate plating on bolts, latches ect. how much did you pay? just curious as to what going rates are. Not looking for somebody to rebuild anything just a general cost for hardware plating. black chromate on bolts, latches ect as well as yellow chromate and clear/blue. not Chrome plating.
just looking for info on what you guys spent to have yours done and how long ago.
thanks in advance.