Bernzomatic makes a variety of cylinders of gas including MAPP (not the original MAPP, but a substitute), propane, oxygen, butane etc. Not all Bernzomatic products are available in every location. The 7/16ths threaded cylindrical canisters that Stuart pictured aren't available in the US -- or at least I've never seen them, and I've looked.
Bernzomatic 480g MAPP and propane cylinders are widely available. Somewhat alarmingly, the connectors are the same on MAPP and propane cylinders!