I am looking for the smallest possible titanium connectors for a keychain system. I have some Cogent Industries Hook-Up clips and they come with some 5/8" I.D. titanium split rings. Is anyone aware of a source of smaller titanium split rings? Alternately, I would be interested in some small titanium master links, if such a thing exists. Perhaps my Google Fu is just weak, but all the ones that I am finding are titanium nitride coated or just have the word titanium in the name.