i have a little passiflora collection going and yea alata are not common. i recently was able to get a single baby alata shipped to me from a forum member after looking on and off for a few months in various places, im lucky although it is not the specific alata variety im looking for which i may look into importing from brazil. passiflora seeds can be sooo difficult to germinate especially if they are not fresh seeds. my advice is wait until further into the season and source fresh seeds directly from someone, you should get faster germination and better germination rates with fresh seeds. to get a live plant or fresh cuttings the best bet is wait until fall when people might be pruning plants back, otherwise just keep looking for it because some might become available randomly before then. i will also say that alata is visually very similar to quadrangularis, and apparently the flowers are also similar and can cross pollinate, mild edible fruit as well. it is much more available than alata, so maybe worth consideration. i find leaves of both alata and quadrangularis to be rather tender and neither are as wind tolerant as edulis varieties if you get high wind events where you are in louisiana