This isn't technically a leave-in, but KMFUM is (for me) kinda sticky and grabby and leaves my hair in good condition (it's moisturizing). When I mix it with FSG it is absolutely the best. Sometimes I add a teeny dab of conditioner.

I get great curl enhancement and clumps from this mix, although my hair is very different from yours, it's not expensive so good for a trial.
http://science-yhairblog.blogspot.com/