Rick,
All of the U.S. ones that I have seen here that were fired and used by the Army National Guard had all nomenclature in French stenciled on the missile bodies and warheads, and containers. I'm pretty sure they were all French made. The next container you need to find, is the fiberglass one that the entire missile was shipped in. There used to be lots of them at the surplus stores. It is about 2 ft X 2 ft by 30 inches or so, with a rounded lump protruding from the top where the warhead container fit. The warhead/practice warhead screws onto the front of the missile body, so it was shipped in the container you have, inside the larger container with the missile body and 4 fins. The fins are balsa wood with a thin aluminum skin. The warheads are not interchangeable HEAT or practice, because the HEAT warhead requires a fuze and booster, which the practice warheaded rockets don't have.