This is now starting to get weird.
Today I went to talk to an auto body supply place. The first question I asked was about the name of the little car-shaped things that HP2 pointed out. I think he was trying to not be rude, but the guy wouldn't tell me what they're called. He kept saying "Just get a sprayout." Every time he'd say that I'd say "I want to see it in three dimensions, not on a card," and he'd give me a weird answer like "You can hang the sprayout on a fence so you can look at it from a distance," in other words, complete non sequitur.
I found a place that offers what are supposedly factory colors in spray cans. Unless and until I can see one in person, I think I'm going to order a can of that stuff and spray it on a diecast.