Where can I find...

one of these, but to fit a 25mm (possibly 30mm depednding on fitting) hole...

http://www.kustompcs.co.uk/acatalog/info_1998.html

Any ideas?

Here possibly?

This link might work better:
http://rswww.com/cgi-bin/bv/rswww/se...cape&Nr=avl:uk

Removed the SessionID from the URL. God i hate it when developers do that.