Would this link be more for the cylinder you guys are looking for? It is listed as being for a half ton, so I am unsure of the bore diameter, but if it is the appropriate size, then it may well be possible someone is making these up again.
http://www.ebay.com/itm/1941-1942-19...74e806&vxp=mtr
http://www.classicpartsusa.com/produ...ster_Cylinders