You can buy Sams Photofacts directly from the publisher:
https://www.samswebsite.com/en/photo...earch&s=Search
If you live near a large public library, it's worth checking with the reference desk. Some libraries have subscriptions with Sams that let their patrons download any Sams manual for free.
Regards,
Phil Nelson
Phil's Old Radios
https://antiqueradio.org/index.html