Here are links to the KU reports mentioned above. Not sure if seeing the reports will help.
KU-2958
https://catalog.archives.gov/id/147898844
KU-2957
https://catalog.archives.gov/id/147898837
KU-2927
https://catalog.archives.gov/id/147898500
KU-2891
https://catalog.archives.gov/id/147898359
There is a commercial service I have used to get IDPF files in the past. It is NOT free but you can generally get a file electronically in a week or two. I can PM you the address if you interested.