How about one like this. I personally do not need one, but like mentioned, big and easy to see. It seems like you would want function not looks for competition.
This one just happens to be 60mm. They make it several different ways. NO, NC, Pull to reset, turn to reset, and key to reset. They even make switches with both NO and NC contacts in the same housing. Set one set of contacts to open the circuit to the converter and another set to close to a resistor to tell the TCM that the circuit is closed.