It ended up being released on later re-released "legacy versions" of Grace, which felt a bit tacky, cos it was in it's final state when he decided not to include it in Grace, and his mother respected that when she pieced Sketches together, obviously choosing to include unfinished songs before including Forget Her.
All the live recordings and re-releases got a bit tawdry when it was his record company doing it and not his mother.
Yeah ok, I always wondered why it wasn't on the album given it does sound so completed