Just saw this thread... on the question as to scarcity, I can say with confidence that all Gothams (Gothi?) have Ti bezel rings... in addition, Leef and I had a small number of extras made. He kept some and I kept some, mostly for use on our own lights, and as spares in case a Gotham needed one replaced, or a part got lost during the build, etc. I am not aware of Leef selling any of his Ti bezel rings. As for me, I've sold a few to folks either individually or as part of a build, with emphasis on a FEW... I never had more than a handful to begin with and most are on my own lights!
In addition to the above, Leef made a bunch of these bezel rings in STAINLESS STEEL to be sold at Lighthound, so the stainless version is readily available. To my knowledge Lighthound has never sold the Ti version, you only ever got one of those if you took it off a Gotham or got one of the few from my personal supply.
That's what I know, guys... so though I haven't been following this thread, if 84maroon says these are scarce, that would seem to be a credible statement given the above background.