rutracker.org (note this is different from the other rutracker so make sure it’s .org) is a Russian tracker with a lot. From what I’ve seen, most of their flac is from Quboz but I mostly go for popular stuff so idk about about more niche music.
Honestly, even though it’s a pain, it might be worth it to just bite the bullet and try for the Redacted interview. I’ve been thinking of this for myself.