rooting a cutting, especially from an older tree, is notoriously difficult on these. if it were me, i'd go ahead and grow a few from seed (did this a couple years ago, actually), and then think about grafting material from the tree you like onto those little rootstocks. it may be possible to buy persimmon rootstocks somewhere, too, but i haven't seen them. i've had decent luck with grafting one american persimmon onto another (though it's gotta be a fairly young rootstock.).