In 2018 I started to download everything from some of those blogs and youtubes (stahlfabrik, italian tapes, 433rpm, dieordiy, visioncreationnewsun...) to create a "Shazam" type database of fingerprints, so tracks could be identified. (I was doing this for another trackID finding project).
I ran the unknown tracks from the SxT tape through it in 2019. It didn't come up with many matches, but might be worth revisiting.
The software used for this is called dejavu: https://github.com/worldveil/dejavu