Replications are available online, can't seem to spot any of the original material as of now. http://exo-science.com/phantomleaf.html (!!Woo-woo warning, just take what you need and exit stage!!).

Reverse search off above leads to "The Phantom Leaf Effect: A Replication, Part 1" "https://journals.sagepub.com/doi/abs/10.1089/acm.2013.0182". I have not had the time to examine the claims therein.

The second one http://exo-science.com/leaf3.png looks like most of what I found. It's strange to see zero discharge at the cut and an particular at the right part of the cut that has an acute angle. Suspicious...

The other like http://exo-science.com/leaf1.png are very similar to the one in the article, but they just have too much detail on the phantom part to be real. If I have to guess, they cut the leave and put both parts on the device.

I'd wait until Mythbuster return.