ok,so i originally asked r/lostmedia and i didnt get much,and we have been stuck quite recently (altough someone did find a site associated with peff that is still up today that had a discord with some of the songs) we are stuck,the only songs i know and recall that are left that havent yet been found are
kjell
ja hallÄ!
you've gotta fight
there might be more but those are the only ones i recall that are still lost,anyways here's a link to the peff archive