Westone Quantum Restoration

OK so I think I was in the wrong thread earlier so here goes....

Hi all I was wondering if you lovely people could provide some advice please. I am about to start my first ever restoration job on this incredible Westone Quantum that was made in 84 (or 82 im unsure) in the Matsumoku factory in Japan. I don't intend to do any cosmetic work to it because I love how it looks but I have a couple of issues sourcing parts that I thought some of you lovely people might be able to help with.

When I got it it had been left in a skip in parts which is just sacrilegious if I'm honest.

Problem 1

The guitar has a single action truss at the heel which has the nut missing (the thread is imperial🤬). This has caused a backbow over the years so I was wondering if this would be easy enough to replace with a dual action truss to help remove the backbow?

Problem 2

2 of the saddles are missing on the bridge and I cannot seem to find the right size anywhere! Does anyone have any experience with these kind of saddles?

I'm also looking for a backplate for it as the original is missing Sad

Any advice would be really appreciated as I'd love to bring this beauty back to life! Thanks in advance

Surprised the truss rod nut is imperial. All Westone gear is metric.

Maybe the rod has been changed??

It's not haha I did some measurements yesterday and it turns it it's M6. I am however struggling to find the right M6 bullet replacement :/

Just buy a replacement truss rod. Cheap as chips.

Or tap out a 5mm nut.