If you don't know the story, when they were making their last (pre-reunion) album Gaucho, one of the junior engineers accidentally wiped most of a song they'd been working on for weeks, and they never bothered finishing it and dropped it from the album.
Until recently this shit quality tape copy was the only version of it anyone had:
But recently one of the original engineers died, and when going through his stuff his kids found a tape with a relatively pristine copy of the song on it.
They got it encoded and put it on the internet, fans fixed up some of the missing parts (it had some dropouts and missing vocals) and cleaned it up some more, and now we have a pretty much studio quality version of it:
Truly a fairytale ending for Steely Fans out there.