I got a little overzealous sanding mine and I needed a new one. Apparently davidsen doesn't sell it seperately so I'm looking for another source. Any suggestions?
Take a trip to your local hardware store or hobby store. In the hobby store, ask for wheel hub pins for micro RC cars (1/18 or 1/16 scale). I am sure you can get something of similar size and resize it by sanding it down.
You can also pick up a tiny drill bit (and I mean TINY! - hobby specific drill bits are of that size) and cut the smooth part into the needed length.