Markings on WW II USAAF Jeeps

A friend of mine has a 1/35 die-cast model Jeep and wants to decal it as a Jeep that might have been assigned to his father, a 7th AF B-24 pilot based on Saipan, and is wondering what the bumper markings might have been on such a vehicle. He asked me, but as a committed aircraft modeler, I’m out of my element here so am asking the experts. What would such a marking look like?

This begs the question: Who actually “owned” USAAF vehicles? The base motor pool? The Base Unit? The Group? The Squadron? Would a Jeep have been permanently assigned to a Group or Squadron? Or would it have have been drawn from the motor pool as required?

And, finally, who makes suitable 1/35 letter/number decals for such markings?

Thanks in advance for the help.

I know this is a WC and not a jeep, but the bumper codes would be similar. The 8* is 8th Air Force, 91BG for 91st Bomb Group, 323 for 323rd Bomb Squadron, and 18 is likely the vehicle number. So the vehicles would be at least assigned down to squadron level.

Here you go:

http://www.lonesentry.com/panzer/jeep-markings.html