Our garden is way past its usual condition for this time of year.
I took some photos of the passion vines and their flowers. They are well in advance of their normal state, I guess it is because the spring was so warm. They were out of the ground a month sooner than usual and the flowers are just everywhere. And of course the aroma around the plants is beyond description. The only thing I know that is remotely similar is a Gardenia. Of course a Gardenia is much sweeter of a smell but they are both very strong and very pleasant, at least to us, and we love the fruit from the passion vine as well.
These fruits are grown commercially in areas of Mexico and are sold in the open air markets there. I found that out a few years ago when I was searching for a juicing method. I don't know why they are not sold here and grown here too. Since they are native to the area they are not hard to grow at all. And even in a drought we will get some fruit.
I did a quick search and found this link to some very helpful information and source for seeds as well. I hope this helps.
Good luck to you all.