Another nursery link...
I don't know much about this place, having just found the link on the NAFEX list, but I noticed that they seem to have a much bigger selection of cultivars for some of the less common tree fruits than the token one or two by more mainstream nurseries...thirteen pawpaw cultivars, four medlars, seven American persimmons, etc. Since "pawpaw", "medlar", and "persimmon" probably account for 60% of the search terms finding this site, I thought many readers might appreciate the link:
Hidden Springs Nursery
They're in Tennessee, and their shipping season only lasts for another week or so, so if you see something you like, you need to get moving.