Orange Crush? isn't that a, selection from Pine island nurseryI don't know the pedigree of orange crush,but I bet it's good.I had bought some jaks from Pine island nursery back in 2005 ,Mai 1 jackfruit and their rootstock sprouted out and it was far better than Mai1 ,and orange color.I cut off the Mai.
The only other J29s in the state I know of were with DR Richard Campbell, PI nursery may have obtain seeds from Richard.After the 2010 cold event Richard lost the J29s as they seem to be more tropical.
Your in a very good growing zone,Iona florida aka Truckland used to be a big vegetable growing
region according to florida stats it had the fewest freeze events in the entire state for Ag region.