Jeff,
Most any auto paint supply store can scan the paint on you coach and mix paint to match, and that is taking the 13 years of sun fade into consideration. I needed a small amount of paint yesterday and the refrigerator access cover had that color on it. So I took the access cover to the supply store, they scanned it and mixed paint to match for about $3 an ounce. They sell paint by the ounce in quantities as small as 1 ounce if they have mixing guides that low in your color, and they do in most but not all colors.
Gerald