Getting Gold Plated Knobs Refinished


Hey Folks,
I have some VAC amps and a Joule Electra preamp which have gold plated knobs. The finish on these parts have become corroded and worn over the years. Does anyone have a source or know a reputable company where I could send the knobs to be polished and re-plated? I live in southern California but could obviously ship them anywhere in the US. 
Not sure what the cost would be, but assuming it wouldn't be too expensive as these are relatively small items.
128x128trouts10
If you google metal refinishers, about a ton of shops come up in the L.A. area alone. There's so much industry in SoCal that there has to be some reputable shop that can do it. 

Also consider any decent jeweler. If not, they should be able to recommend someone locally.

All the best,
Nonoise
Tanury Industries in Lincoln RI....I dont know if they will do small jobs though but you can give them a try.   They do a lot of emblems for car companies and gold plating for jewelry.  
Have you tried contacting the manufactures to see if they offer new replacements of if they can have their plating company do them? I would think that they could help and maybe cheaper if they include them when they send an order to their supplier.