Unobtanium or not? (T17 "tank" parts)

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So the other posting on an Omega T17 movement got me distracted and thinking again about the parts I found mixed together with a bunch of other 'used parts.'
I found a copy of the service page somewhere. (probably here.)

One part I can not find is the clip which holds the balance bridge cap jewel. I think this is part 5165 Which is labeled Plaquette de coqureret, acier (Excentrique de coqueret) Which of course google not knowing 18th century technical french mangles. At least it did not say stuff about crazy steel chickens.
It is possible I have this part somewhere, although I looked for it after I emptied the box of 'dust.' Possible it was in the photo I posted here. I have looked through the separated boxes, with no avail.
While there are quite a few parts and a case I am watching, plus a movement almost identical to mine with the same issues, on flea bay; No search actually returns results for 5165. I have a pretty good idea of what it looks like. A thin washer of steel with a slot in in and 3 divots which lock in the legs. That I found the cap jewel I find inconceivable.
I also see that my post here are aggregating on giggle. As my post came up first. https://omegaforums.net/threads/omega-t-17-restoration.148953/
The other part I can not find in the stuff is the pallet fork (lever in this case) 2060. One would think that would be sort of obvious. 5075 regulating arm also seems to have gone walkabout. On the other hand there is a good chance I found the escape wheel.
The question is, would 5165 be the part I am looking for?
The other question is, should I consider re-pivoting the center arbor and seconds bit? The ones on eBay seem a bit on the pricey side. The showstopper though seems to be 2060, Otherwise I might have enough parts to see if it would run.
-j