I’ve done the same. You can get some obscure stuff from soulseek if Lidarr isn’t finding all the stuff you want. I’m mostly using that and just using Lidarr for organizing and tracking.
You’re 100% right about the plexamp DJs. They’re super good. Love the deepcuts one.
You’ve listened to the Pete Seeger song though right? Solidarity Forever is based on The Battle Hymn of the Republic. They both use an AAAB rhyming scheme and I think are in iambic octameter but I’m not a professional. Pete Seeger didn’t write it, but I love his rendition. He’s got alot of great labor songs.