Looking for membrane pushbutton for project

I have built a cryogenic precision thermometer with my arduino for my liquid nitrogen project http://homemadeliquidnitrogen.com. One of the features is to be able to toggle between Fahrenheit and Celcius. I can use a standard pushbutton. I have seen some simple thermometers that have a membrane, keypad-like button that one can push. Digikey sells surface mount buttons that toggle between a Normally Open and Closed state. I would have to find a cover for it.

Does anyone know where I can buy a single keypad-like button. It would already have a covering over it and it would have the necessary wiring. Basically, I'm looking for something a little fancier than a standard toggle or push-button.

These things are usually custom ordered, so generic offer some tradeoffs.

You can use colored or clear contact plastic to cover.

Thanks, but this is what I already have.

I guess the key is they are custom order pieces.