i believe these are butane stoves, correct?
while not popular at local "hardware or outdoor" stores, these little stoves are still popular among the asian market and literally you can still buy stove and fuel/bottles of butane at the asian markets/grocery stores (particularly korean market stores) for pretty good prices. I much prefer this stove over the propane stove i have which accepts the typical disposable green "one pound" steel spin cans which are no longer cheap.
hope this helps.