I have never been able to find any of the smaller switches or check valves at local supply stores. I have always had to order them online. One place to check is hydraulic hose suppliers and bearing companies. They tend to also supply some air control devices. I am able to purchase lots of hose and fittings from one of my local bearing houses, that doubles as a hydraulic hose supply house. There are many places online that sell switches and check valves. I have used viair for switches before.
Later,
Tom
Later,
Tom
