I know a place in miamitown (actually right across the street from the lady that does leather seats for Brian) that does really good powder coat jobs. He powder coated the wheels on a motorcycle once. I bet the Wheel Doctor on Route 4 would also do it. He powder coats all the time. Of course you'll probably have to completely break them down yourself before taking them to either place.
If you take them to wheel doctor and he tells you 100.00 or any price.. GIVE HIM EXTRA MONEY! they will get done ASAP and a good job will get done. Say if it is 100 gve him 150.00 They will usually be done in days!
If you dont do there the guy on harrison I heard does good work however I have never had anything done by him.
Also out here in Goshen next to my car lots there is a new place open. On rt 48. I will be taking some things to see how good they are and I will let you know.