Like many people on this site - I bought my bike with this little bugger missing too. I looked for a bit when i first got it, but then finally gave up. Seems like they are tough to get ahold of.
I have a quick question: if/when the piece can be found (or donated by very cool forum members), does it work just like putting pliers in there? I mean, does the special piece offer some other type of access to a mechanism that resets it quicker, or is it always turn, turn, turn???
Thanks,
Scott