There are a few shops around me that do it. They have a base charge for barrel plated items. The base charge was $40 a couple years ago. I had to do mine in two smaller batches because I wasn't very organized. If I would have had everything ready at the same time, I could have gotten every clear zinc plated part on the car done for $40. That includes the larger items like coil bracket, spare tire stud/nut and heater hose bracket. If a part will fit in their barrel, it's just one fee. I had Key City Plating in Dubuque do mine. They even ran the kick down linkage through for free. I had everything clean before dropping it off. Muriatic acid makes short work of cleaning up fasteners. Look in the yellow pages and I'm sure you may find someone local.