I have for sale brand new Honeywell Snap Action micro switches. They come with a quick connect screw mount, N.O./N.C. switch configuration. They are a direct replacement for the over ride switches commonly found on many USI/FSI canned soda vending machines.
If your soda machine is vending multiple cans, there is a good chance that the over ride switch on that selection is going bad. This switch rides on a cam attached to the vending motor and tells it when to stop.
Reference the picture above with the over ride switch installed to make sure it is correct for your application.
Last time I bought one of these from Vendnet, they charged me $31.44 plus $16.57 shipping. Verify for yourself, their item number is 8620718.001 Buy a few extra to keep as spares.
Free shipping is continental US only, using USPS first class mail. Other shipping arrangements are at the buyers expense.