I know perfect circle has a bunch of these perfect circle farm
Mad cat also sells some
@hobilus may know more about them
I dont know much about Compton persimmons. I do know some. The persimmons are actually the work of Donald Eugene Compton (DEC) from Indiana. There are many of them like DEC wannabe , DEC Goliath, DEC Money maker , DEC King Crimson etc.
This thread says a little more Donald Compton persimmon .Many have taken road trips there Log into Facebook | Facebook