Okay, after a little looking around I remembered this place. It's Boyce Equipement and Parts Company. They specialice in "stuff" off of military vehicles.
And since this vehicle was used by the Army, they might have it.
well its 4 wheel drive, but the middle wheels do rool for going off drops and to aid in not getting high-centered. I have no idea what the pattern is, he doesnt know and we cant find it anywhere. Thanks for teh help, i'll give him those sites.