If you are looking for what I think you are looking for, what you actually need are two parts - a tiny little barrel with points at either end that sits in a hole under the bezel, and the spring that sits under the barrell and hold it up against the bezel clicks, and you are not going to believe this but my missus found one of the very parts that I lost (and thus condemned that watch case) on Saturday, nestling in the pile of our bedroom carpet, 6 months after it disappeared. I don't unfortunately have the spring as I sent it to rmcsherry, but my guess is that the spring will be the easier of the two parts to either source or fabricate!
I think I still have your addy...