Send a PM to
chris77586 and see if he still has any left. He's been the best source for a replacement Sony stylus that fits into the original slot. You can read about his great work on it in
this thread. My guess how some break it is when pushing it out, too much pressure is applied sideways when it's out of the channel, thereby cracking it. I usually just give it a slight nudge up until only about 1/2" is showing, then carefully slide it out the rest of the way without exerting any pressure.
Edit: And I don't think you have the record for quickest stylus break, if I remember, another member had it happen pretty quickly too.