Here it is. Beware there is no UI here; it's just a bunch of data in a table. The first sheet is a guide.
https://filetea.me/n3wYtvASptWSLuUxURLHFMhtw
I wish there was something like it for the publications I haven't read, which makes me think that maybe (a very few) others might find use for what I've done. If you have an idea of how to reach them or utilize it, I'd appreciate it. Please don't share it yourself.
I hadn't used FileTea before; it's perfect for many uses. Does the shared file expire at some point?
EDIT: I should add that it omits some sources that I subscribed to before I started the spreadsheet, including the leading think tanks (Brookings, CSIS, Rand, etc.), the Financial Times ... that's all I can think of off the top of my head.