From what I know the 1999 DVD is the best source for the mono audio
A capture of it exists
Has anyone synced it to the 4k BD yet?
I did a fan edit that is supposed to be a recreation of the theatrical version. Given there aren’t may changes compared to the 4K transfer. My project included a recreation of the Saul Bass WB logo that was on the original release, done by me. Also the original mono tracks from the LD and 1999 DVD and the original blue credits at the end.
https://originaltrilogy.com/topic/The-Shining-1980-Zemastered-Edition-Released/id/70072
This may be what you are looking for.