Hello, Ike and welcome to the forum. There are some limited references to other photographers in some of the catalogs but these are well known men whose wares Larry sometimes marketed. Johnny Castano and Peter Flodquist are among them. We also know there was some collaboration between Larry and Lilo Korenjak who it appears acted as a European agent for marketing Larry's work. I don't know Hilbert Hanson but hopefully someone else will.
All the model names you mention are well known to us and the slides with "commercial rights reserved" are typical of the slides which were sold. We'd all love to see scans of these slides both for the pictures themselves but more importantly for the historical aspect of the notes (hint, hint
).