A few things regarding the first timeline: 70 more episodes of Super Friends, 36 episodes of The New Adventures of Superman, and god knows how many flashbacks and time travel episodes I gotta skim through for timestamps...
Okay, MeTV has aired all the Plastic Man stuff, side-segments and all, in very decent quality.
They're not lost media but some of it is difficult for the public to get a hold of.
It helps too that we'll probably never get a Dolores Claiborne remake because of how well received the film was that I'm sure King wouldn't see any need to redo it on film again.
Mr Parker Painting and Mr Parker Mad Moves are the two lost ones currently.
I contacted that instagram user to see if she has them download and saved or not.