Someone suggested grain alcohol but all I could find was Everclear, and it was to expensive to be used as fuel.
Methanol, Methyl hydrate, wood alcohol, fondue fuel, all the same stuff. It is poison so you can't drink it, only burn it.
Usually you can buy it at paint supply stores because it is used for thinning shellac. If not there then in a place that sells cooking stuff because it is the standard fuel in fondue and chaffing dish burners.
I buy it at the hardware store in 1 liter jugs but they sell it by the gallon too.
You might also find methanol as a fuel for model airplanes or for race cars.
Somebody mentioned it might be available as biofuel at the gas station, but I am not sure if that is true.
It is corrosive to aluminum so do not store it in aluminum containers. The best thing to store it in is clearly labeled plastic bottles.
I never found isopropyl alcohol to be any good for fuel, it has too much water in it to make much heat and it burns greasy because it is more like paraffin than methyl hydrate is.