I don't know of any that specialize in just that but I would think any good Chrome shop would be able to do that for you seance they repair and re-chrome small tin part's, The one that I want to send my parts to when the time comes is Paul's Chrome Plating.
http://www.paulschrome.com/They have been on my classic car and also on horsepower tv.
Hope this will help you.
Bob
