Wow! I’ve long wanted to hear at least the original mono for the original film but this going the extra mile! Currently I only have the LD and BD boxsets and despite the stereoization the LD 2.0 stereo tracks obliterate the new remixes. They’re largely mono with stereo score insertion but can pan to the sides at times as you mentioned on MF.
I’m interested that the LD reissue of MF sounds different as I thought all the individual releases were ports of the boxset discs.