Finished scanning the Sprayberry Academy of Radio, 1945 edition of the home study course, generously shared by Dave Holder. Some of these weren’t scannable and a few were missing.
I was able to discover the names of the missing booklets from items that were listed on eBay. Perhaps someone else has these and can scan them for me (or send them to me for scanning and return by U.S. Postal Mail). To match, I’m using 300dpi scanning, greyscale. I can crop or cleanup as needed and put into an Acrobat PDF file.