Sapote, have you tried commenting at the Passiflora societies?

http://www.passiflorasociety.org/

Here's a facebook page:

https://www.facebook.com/passiflora.org

Good luck. GrassyKnoll has over 100 cultivars/species, but I didn't see either of the ones you spoke of.

Are these cultivars of p. edulis? Black Knight may be easier to find. Have you seen Purple Panda? Very tasty, I have mine flowering right now, should have fruits in a few months if you'd like fresh seed.