Most sellers provide a paint service $70-90 when you order your frame.
But if you have it already. I made some wood(MDF) furniture, and brought them to a small company here in Belgium to make them paint.
Then I asked if they would paint carbon frames too, they said sure no problem, and for about 100€. I didn't try yet.
All this to say that you can widen your search to any painter: furniture,motorbike,cars, and if you're luck and fall on an artist, great !