After listening to Silent Sorrow (I've never heard it until now), it seems that was a Hackett driven song, with the swells and ethereal elements. He does have a few solo efforts that come close, but more guitar driven. I haven't dug into his work too extensively, but here's something that might work for you:
I'd say look into his body of solo work and you'll most likely find some gems that are similar to what you're looking for. ...and I hope I'm not being to crass, but I've done some similar tunes with an ethereal quality to some extent. Not trying to toot my own horn, just something that came to mind. Again, they're mostly guitar driven:
Not Quite The End by Planktons Odyssey
The Caves of Altamar
Good luck in your search.