I can't think of the name of the place right now that I purchased from, but they had a good selection of paints available in virtually every type, touch-up, spray cans, qt, gallon etc.
I think it was a link from another thread in this site, try doing a search for touch-up paint or spray paint, you should be able to find it on here. Anyway, I've used quite a bit of the spray can stuff and it really works great! The match is perfect and it's good to work with.
"I have taken more good from alcohol than alcohol has taken from me." - Winston Churchill