He may even have a regrade without his customizations. He is collaborating with Dre on an ESB regrade.
Yes, that was for his custom ESB. I don’t believe he has a version without his customizations rendered out, I’m pretty sure applying the color LUTs was the last thing he did before rendering the final version out.
There’s not that much that would need to be changed video wise, though - you’d need to use the BR or HDTV version of the Wampa scene, the shot(s?) of the window on Cloud City, and Vader’s shuttle ride, and Despecialized for the Emperor hologram, which you’d have to do anyway. Plus, of course, all the other 1997 reversions that are already a part of this project.