RCKEN is right. Try these screws from microfasteners. I've been using them for a while and love them for this and other stuff too. Get their catalog (online too), lots of good stuff.

I bought a couple of their storage boxes and filled them with all kinds of their stuff and the prices are great for quality stainless products.
http://www.microfasteners.com/catalo...ategory=SHWHMS