Team Negative 1 also released two 35mm scans of ESB around January 2015, known as the Grindhouse v1 (a.k.a. “Renegade Grindhouse”) and Grindhouse v2 (a.k.a. “DCP 2013”, taken from a different print). They colour-corrected the red-faded prints to an extent, but didn’t clean them up the same way as with Star Wars SSE v1.6 before they disbanded. The first Grindhouse is more easily available and has been very nicely cleaned by Dreamaster. Relevant threads here:

http://originaltrilogy.com/topic/Team-Negative1-The-Empire-Strikes-Back-1980-35mm-Theatrical-Version-Release-Details-and-Updates/id/16108
http://originaltrilogy.com/topic/Denoise-Regrain-And-CC-of-ESB-Grindhouse/id/55093

They didn’t do RotJ as far as I know, but Harmy has released his own 35mm grindhouse version:

http://originaltrilogy.com/topic/Harmys-RETURN-OF-THE-JEDI-Grindhouse-35mm-LPP/id/48258

Bluto