Well, I have African-American mixed hair, and there's plenty of pics of me with curly hair in the FOTDs and my profile. Not too sure if you mean 100% African-American hair or not.
I don't know of pix but I can recommend a couple of lines I currently use and love. I use Ouidad (Ouidad.com) and Mixed Chicks (MixedChicks.net). Good Luck!!