Certified GKH Gardening Expert
You are in hardiness zone 9 and those trees are hardy in zones 10 and 11. You could try it with winter protection and see how it does. You can mail order seeds from a reputable seed catalog company. (I would discourage buying from individuals. We hear from many disappointed folks who write in and say they only received a weed.) A Florida nursery or catalog may have them since they are popular in Florida.
These articles should help.