Ask the internet: Sprung pins

I need 4 sprung pins like you get on walking sticks (the type you get that you can push in but springs back out when not under pressure like shown in http://www.chemist.net/sysimages/origimages/zt-0610r_sp1673.jpg). My google foo is failing me in terms of finding a supplier for these - particularly as I have a fixed size hole to get it into. Oh, internets where might I get shall items from? I have tried Mackeys, B&Q, Homebase and Ebay as best I can. I may be lacking a proper search term.

Mad March Fair

Myself and shortcipher shall be wending our way towards the Mad March Fair this weekend. We have found a lovely B&B with accessible rooms and will be making a weekend of it particularly given we know some wonderful people will also be there. I will also be heading off to the sea and round museums - I've had very few holidays in recent years (read the odd weekend and then always exhausting because of access) and though this is only a weekend I am really looking forward to it in a being somewhere new, outside and relaxing.

We encourage you to join us, it should be awesome, also, who might we be seeing there?