Find a place that sells automotive paint. The good kind. Around here, i've got a place called Fisher Auto Parts. They have awesome paint. My dad had to get some BMW paint from there for his Blue 740iL and Black M Roadster and they both turned out looking great. I know BMW has a color similar to Montego blue, its called Avus Blue. Instead of the color kinda turning green like RX7's, it turns light blue and a little purple, it looked really good on his M3