No idea if there's any working fork or any solution directly related to Spotify.
However, keep in mind that Spowlo downloads from YouTube music and while I was also an advocate of MeTube (yt-dlp frontend), I recently found out that even though you ask for the best quality It downloads some sketchy mp3 64/128kbps upscaled shit. Maybe those having a premium account it's different, dunno...
So I suggest you give Soulseek a try, specially Nicotine+. There you find high quality mp3's (320kbps range) and a lot of FLAC quality if that's something you're into !
If you still can't find what you're looking for, give rutracker.org a try :)