The only source I know of is Raintree Nursery. It is very pricey! However, I bit the bullet and got one anyway. I only got it recently, but I may have cuttings available for trade by spring.

Hello, old friend. I've seen your handiwork at the Banana garden....I hope you and yours have been well. We must get together for lunch again sometime...AND believe it or not, I had a passiflora edulis seedling sprout up in my yard @ Halloween...and it is still there. It is either the "Black Knight" or a "Black knight-purple possum" hybrid. Richard, the funny thing is, my last p. edulis vines succumbed to some sort of virus or fungus in August 2005. You are welcome to it amigo.