So far there were no experiments on V. palandensis. No protocol published.
Papaya is easy to clone, but Vasconcellea is more difficult. There are few rare TC protocols on V. pubescens and Babaco. Babaco is quite difficult to clone so I suspect V. palandensis to be also. It gets easily damaged by chlorine and it has a high rate of hyperhydricity.
The experiment you want to do it's more like a doctoral thesis. I make TC for bananas, may try to get into cloning Vasconcellea.
Babaco can be used as a root stock, on which papaya can be grafted so I expect V. palandensis to work as well. Here is my experiment
https://www.facebook.com/plantetropicale/videos/1172871089402049/Babaco roots are no so strong as Chamburo grown from seeds so I prefer the later.
Air layering should work also, but I expect the roots to be more sensitive.