I once visited Chertok at his apartment on (IIRC) Riverside Drive to discuss putting out some of his films on Lazer Disc (speaking of media becoming obsolete. I believe that most of his collection is now held by Mark Cantor who is still cataloguing it so he may find some pleasant surprises.
Lon, what's the next set? Teddy Wilson? I couldn't find anything under "Upcoming releases" on their website.