Or a website or public cloud drive that is already still up. @Abigail_Eggsong claimed to have found where he got all the images from. I didn’t care enough to investigate this claim.
Perhaps the image file names could provide clues as to where they are from, or searching Google for the images.
Also, Mr. Larkmagnet has spent more time in-game than most people do, and that can explain a lot of what he knows.