Try http://www.paintscratch.com/. They guarantee a color match; they even send you a test piece to paint before you spray the part so you can check the match. IIRC, when I painted my Sirius antenna back in the day, I bought everything in a kit from them, including the paint, adhesion promoter with flex additive, clearcoat, and a bottle of fluid (maybe a polish for sanding the color coat, I don't recall).
















