I would find a paint jobber that has the camera set up. I have used both PPG and Dupont for that with pretty good results. By touch-up you mean like a dab a little paint in a chip? Usually the smallest they'll mix is a half pint.
yea - I have a "buddy" here that is a painter, but he has never even come to see the car since I bought it - def have to count him in the "jealous buds" group.. I have a feeling that if I ask him for a favor, it'll never get done...