MSM: "I have a genuine 1680 dial that was re-lined and shaved to 26 mm to fit a 5513 case. I have a genuine 1565 movement with original hooked 7 date disc as well."
Nanuq: "My advice is to hurry up and wait."
Good advice.
I will add one thing to "My advice is to hurry up and wait." While waiting, read everything you can find about these projects to avoid making more mi$take$.
The mi$take:
You would have been better off if you had left the dial at 26.5mm because all oem spec '5512/5513' cases are made for 26.0mm dials (your shaved dial is Ok for this), and thinner no date 1520/1530 movements (1530/60/70 in 5512 -- same case).
So...your movement is too thick for a 55xx case and the dial is too small for a 1680 case. If the dial was still 26.5mm an oem spec 1680 case would work.
Q...What are the options?
A...Not much using oem spec 5512/13 cases because of the date movement thickness.
Q...What will work?
A...A 5512/13 cartel case that is oem spec (correct case neck size/bezel set size/dial seat/case tube threads) but made for an ETA 2836 will probably work...or an MBW/MBK case.
Note...Cartel cases can be hit or miss from one batch to the next, even from the same dealer.
Read the sticky 'Building an MBW Sub' a couple times to find some of the answers to putting rlx movements/oem spec dials in MBK cases.
Good luck with the project!