A pity Universal isn't on the list. I'd dearly like to see a DVD release of "L'Homme qui rit" (aka "The Man Who Laughs")It really is. Carl Lammle decided, back in the 1930's, to turn the negatives and existing prints of most of their silents into a bonfire.
The ones which survive are either public domain or owned by Photoplay (Kevin Brownlow) after restorations.