captainsolo said:

I have both DYS discs and will happily help out with the mono. You need the earlier Image disc for the last line, and the new BD or some other source for the correct uncut flashback cue.

That sounds great! A capture of the audio on both of those discs would be amazing. TheHutt's English Mono from the Italian Blu-Ray could be used for the flashback cue I believe.

Unless I'm over looking something, this would be enough sources to effectively recreate the English mono for the complete cut of the film.