Haven't given up on this. I now probably know more about the family history of the descendants of Alvin W. Krech than they do.
Given what I've found I believe the sheet of cards is either still in the possession of the family or somewhere in the collections of Yale University. If it still exists.
Shepard Krech, the oldest son of Alvin W. Krech, died in 1969. At that time Yale University acquired a collection of books illustrated by George Cruikshank. Alvin Krech was a noted collector of Cruikshank's work. This indicates to me the collection was probably kept together after Alvin's death in 1928 and broken up in 1969 when Shepard died. It's possible the collection was broken up earlier as the family sold two leaves from a Gutenberg Catholicon in 1939 and they were also in the habit of donating to museums.
I've written to a couple of Shepard's descendants asking if they know what happened to the sheet but haven't heard anything back. I'm hopeful I'll hear something in a few weeks. Realistically I'm going to hear silence, but hope springs eternal.