These (@ Farnell) sound like what you're looking for.
e.g. a typical 2 pin switch uses one of
these with the corresponding crimp sockets and respective crimp tool further down the page, the crimp tool is seriously over priced though.
If you haven't used Farnell before, I have to warn you; the minimum order value is £20 ex VAT so have fun filling your basket, free delivery though.
EDIT: Instead of a crimp tool you can use pliers, personally I solder the wire on and then fold the crimp bits using pliers.