A powdercoating shop would do it. The price range is around 200-300 for 4 rims I think.
SteveBlack 97 GSFirst time at track 16.231 @ 86.11 (Intake & Exhaust/ 17" rims)Best time- 14.154 @ 101.22 W/O N2O- 15.916 @ 88.98 Magnacor