I did frame-by-frame restoration. I used the French HDTV footage to restore the parts of the frames that were censored on the US Blu-Ray. It wasn't a full frame replacement.
I think the towel blot was on the laserdisc and first release of the DVD. It was removed for the second release of the DVD and the Blu-ray.
Thanks to Silverwook, I have the frames from Trail Mix-Up with the uncensored Rigid Tools poster. I'm over half done restoring the poster into the blu ray footage.