Are you looking for the "early" jerry-cans with the separate bottom piece and screw-type cap, or the later ones that were a closer copy of the Germanicon, (hence "Jerry" can), two-piece stamped body and quick-release cap?

My brother scored one of the "vintage" ones many years ago and I have seen very few others except in the hands of hard-core collectors.

The allied use of the "Jerry-can" started in the North African desert, as far as I can work out. Fuel for Britishicon forces was supplied in bulk, or in 4 gallon drums, colloquially referred to as "flimsies", for reasons that now seem obvious. "Liberated" Jerry-cans were a hot item and enthusiastically sought by anyone wanting to not irrigate the desert with precious fuel (or water). LRDG and SAS vehicles were usually adorned with a generous supply of them.