I installed one of the functional Yuki valves for bro. woof a long time ago - exactly like the Rolex item. It was a bit nerve-wracking but I got through it. But, it's not a project to tackle with a hand drill unless you are going to "cheat" like Automatico did!
All kinds of different watch related terms explained. Of course all of us here already know all of them...
https://newatlas.com/watch-terms-glossary-technical-reference/53691/
I don't think it would be feasible as the "Rolex" DW is wider than the ETA DW. I suppose maybe a very thin (.oo6" or so) blank brass ring could be bonded to a standard ETA DW and then be printed but unless thousands were sold it would be a helluva lot cheaper to do a good DWO and then futz around with the alignment.
I don't think "complication" is the issue. Although I would love to see the 1570 repped I understand why they don't do it. Parts suppliers tell me that most factories are primarily interested in producing what is "hot" right now and don't put much priority on "vintage" stuff. This was the reason I was given to explain why I had to wait 8-10 months to get my last batch of 2824 DJ cases.
That being said if there is a petition going around to present to get a 1570 repped I'll gladly sign it!
I think you could probably replicate any of the older ones to a gnat's a$$ and not have any problems as long as they (mid-case and back) are sterile. If somebody wants it engraved they can have that done later... The initial setup (jigs, fixtures, etc.) and programming will be the killer but once that is paid for each rough machined case shouldn't be too expensive.
Two-toning it will be pretty easy if you have access to a lathe. Chuck it in the lath, spin it up, and apply a Scotch-Brite (or fine sandpaper) to the section you want "silvery" and you're done!
Welcome back to the land of the living! Oh, and Nanuk still vintagizes his watches by running over them in his driveway so I guess nothing much has changed!