If you look on the Facebook Monograms groups (you may have to join!), you should be able to find recommendations for good paint shops fairly local, and perhaps even a better price. Painting flip-colour Monograms is expensive, because of the huge price of the paint, and also the skill needed to get it right.
The MG-R Monogram Appreciation Group
https://www.facebook.com/groups/mgrmonograms/
Maybe even: MGR Monogram Appreciation Group (Sales / Wanted)
https://www.facebook.com/groups/mgrmonogramsales/
David