Nice! Looks possible, but time consuming. And would take programming a new analysis program.
Considering the lengths people are willing to go to for star wars preservations, I wouldn't be surprised to see an "electron microscope laserdisc scanning and analysis to retrieve pure video signal" project pop up. (Fingers crossed).
But yes, a 3 source cross reference scan is more probable by far.
Either would be an awesome source for Harmy.