I purchased the Sherwin Williams colors that Yendor0 mentioned in post #7, though I bought latex paint instead of oil-based paint. Thickest paint ever; the stir stick will stand up in it indefinitely. With paint that thick, it wouldn't spray and once I thinned it to the point where it would spray it was too thin to adequately cover. As it happens, the yellow matched quite well but the red didn't.
Since I needed to repaint the head completely but didn't need to do anything on the main cabinet, I reverted to spray paint, which I find easier to work with. The Rustoleum Marigold mentioned by Bumpnthump05 in post #8 above is actually a pretty close match to the factory yellow. For the red, I had five different shades of Krylon red paint on hand, including the Red Pepper that he mentioned, so I got a piece of wood, tested all five and held the wood up to the cabinet to see what worked best. For my cabinet, Banner Red was a closer match than the Red Pepper.
Since the head and main cabinet are separate, the slight differences in color between the two aren't noticeable.