My best advice is get any US Region 1 NTSC DVD release. You could probably get one on Amazon for like $10. Doesn’t matter which version or which cover it has. The mono will be there. I don’t have an audio file of the mono for you to use so telling you what’s changed isn’t gonna help if you wish to use the sound effects in your mix.
If I recall correectly, the DVD had compressed audio compared to the laserdisc which was far superior.
So if anyone does have that laserdisc file, please share