Just an FYI, and you may already know this, depending on the color, it's really hard to color match. A painter is going to have to do what's called "let-down" panels. It's tedious and more expensive. They will have to take your paint code, and paint, probably a half-dozen panels with slightly different combinations/applications in order to (almost) exactly match the rest of the vehicle.
It's not commonly understood but the same paint code will have slight variation, or it will "lay down" differently. So, depending on how thick the paint or clear is, you'll get a different shade. Most of the time you can't tell the difference, unless you have flat panels right next to each other; meaning, you put a door (painted the exact same color) next to a quarter panel or fender and it will look like a different shade.
You have to be an expert to do the job right, and even then, the sun hiding behind a cloud will make all the difference and the customer will see that slight variation in shade and you'll have an upset vehicle owner demanding a re-paint.
It's easier (well, maybe not easier labor-wise) to paint the side of the vehicle, tinting the color and doing a blend into the adjacent panels so you can't tell where the new paint begins and where the old paint "blends" into it. You don't want to touch your stock paint any more than necessary; it's typically the highest quality paint job (except custom) you'll get due to it being applied and baked more consistently.
I don't know what color you're trying to have them painted, but you're not likely to find someone that's going to want to do that job without spending a lot on time and materials. It's not easy.
