I've posted this on Londonbikers forum, but I like to re-post it here to see if anybody has any ideas:

I bought a second hand zumo the other week and used it for the first time yesterday (recording routes so I can ride them again on my own ).

It seems like a really good build unit so far, but one thing that annoys the cr@p out of me already is that stupid little "security screw".
I managed to loose the "protection" half of the stupid little screwdrivery thing in the first 1/2 hour it was on my keyhanger (single cylinder vibes are probably to blame, but nevertheless), and I managed to drop the satnav as I was fiddling around trying to loosen the screw and take the unit out of the cradle at the petrol station.

So anyway, I thought everybody must have this problem and there must be something better. It looks like a lot of people have this problem and some guy in Holland is selling little thumb screws of the right size: http://www.boelis.nl/index_bestanden...ityscrewEN.htm
Fair play to him for making some money, but I think 5 euros + shipping is a bit steep for a screw. Particularly considering it's probably worth getting a couple in case you loose one (�10 for 2 including shipping).

Does anybody here know if/where I could find something similar? Anybody has a hardware store or machining company or something? I'd be happy to spend a lot more than the �5 to get a box full of them and re-sell them at cost or give them away to other forum members.