Thanks for the comments on the Jeep decals, they are all custom done.
The stencil font is called USAAF Stencil available for free download at dafont.com, 08JK is obvious, the 641936 is the last 6 of the VIN, which are unique to that vehicle.
Any graphic shop should be able to cut them for you if you bring in a digital picture of it. I have orders some from pixeldecals.com also, they do custom work and have stuff like the flags premade.