Stumbled upon a cool page I thought others might enjoy, Haven University Professor, Dr. Donald E. Simanek, has a collection of personal and antique stereographs on his gallery webpage: Stereo Pictures for Cross-Eyed Viewing.
it’s split into a few different parts, and they’re all arranged for cross-eyed viewing. It would be cool to convert them for the lume pad, but I won’t do that without his permission.