Well unfortunately I haven't yet been able to find a case with the correct ring and bracket like yours and Sym-Cha's. I thought I had a serious contender in a case I purchased on ebay a few months back, however the clasps are far too thick and painted black, bummer, the actual d ring itself does appear to fit the bill so that's what I have residing in my vintage kobold bracket waiting to be installed on my esb build. I can't even tell you at this ppint how many people I've sent messages to on ebay asking for a closer up shot of the carrying handle on their graflex cases.
Longshot here but seeing as you presumably have 2 rings with the proper clasp from your case is there a dollar amount or item you would accept in trade for one of them? I am currently waiting to pull the trigger on converting 2 folmer, no patent 3 cells into luke anh and esb sabers at the same time, using all known/highly likely vintage parts. This is the last piece before I begin, and document accordingly
My case was the same as SymCha's, but the D ring was painted black as were the clasps, they are thin however. When I folded my clasp around it only just makes it and the D ring moves around ok but not without some friction.
As for my second D ring, well it was my first, I had a theory that the clasp on the lightsaber also may have been the clasp on the graflex camera, so I opened it up and could not get it on, so I cut a little bit off the D ring and then got it on, and then realised this was not the clasp used, I then looked at the D rings original clasp and figured, well this must have been used and folded back, I did that then realised it looked better and more likely than my other theory. I was upset for cutting and deforming it the other one. I have tried to restore that D ring back to shape, but it is still a bit out. So my good ring is in my ANH and the other one waiting for a better repair.
The D ring itself I believe could have been the one/type used, it is logical and available to them at the time. I am still not 100% sure about the D ring being used on the ESB promo saber with the rivets, that looks like another D ring that is 1" that I scaled to the circuit board, I used a 1" Strapworks one stretched to the dimensions on my ESB. However on the Ranch saber that D ring does not look like the D ring in the promo shots, but looks more like one of these D rings stretched out, even in some photos there looks like there may be black paint, but that could just be lighting as well. The Ranch saber D ring does look more deformed as if it had been stretched out.
Here is a scaled picture of the D ring. Roys D ring is very close to its dimensions, these ones are only slightly thicker gauge wire and the bottom elbows have more of a soft curve in.
I do want to make a jig so I can wrap around some wire and make some D rings to spec to open up and test out the ESB Ranch idea. If I do this I would be happy to send u one. I paid over $200 usd on a camera with that case just for the D rings, so I can't imagine selling the one I got and being damaged as well. As for the clasp. I might flatten my spare one out and make a template at some point for people who may want this option. Not all people support that this is the exact D ring used either.