I remember when that video came out. I went looking to see if I could figure out a way to do my 4l80 with a cable but decide to stick with the LOKAR ACA-1800 rod. It was just barely long enough.
I did see Jegs and others sell some generic cables:
https://www.jegs.com/p/JEGS/JEGS-Aut...87075/10002/-1