Small update. I gave up on using the Dolby Surround/Stereo from the Pan and Scan laserdisc I have. Beside being massively out of sync, the fox fanfare seemed like the wrong version. Jonno was nice enough to give me a copy of the soundtrack from the collector's edition laserdisc which is better in all respects.

Also someone was nice enough to post a rip of a Hong Kong laserdisc of Alien on the organ. The shuttlecraft scene has more or less the same orange/red tinting of the 95 laserdisc that is missing from the BD. More evidence that the tint was mostly likely on release prints but not the negative.

They also posted a rip of an old Blade Runner laserdisc. It has terrible video but looks like it was sourced from release print. It was nice to see the original golden hues/bright colors that the BDs have lost. And while I'm in a Ridley Scott mood, I tried placing that golden hue (based on that weak laserdisc) back into the BD:

BD/BD with LD colors