Be happy that the museum has not responded/not interested. Many museums are poor conservators of historical items and many times they get damaged, degraded, "lost", traded off or sold outright. I was at the Pearl Harbor museum in 2002 and unless they have expanded, it was not very large so adding exhibits may not be possible unless they rotate something out. One of the most impressive items was part of a Japanese air dropped torpedo and a uniform and photo scrap book of the Arizona of a sailor that was entombed in the ship in the bombing. The torpedo was stuck in the mud just off Battleship Row and there is a whirlpool that can be seen on the well known photo of the battleships during the attack. Apparently the torpedo nose dived in the water, due to the plane carrying it getting hit by A/A fire, and it stuck in the mud with the propellers spinning full bore, creating a white looking whirlpool on the surface visible in the photos. From what I can remember of the exhibits, most everything was from sailors, ships and planes that were in the harbor at the time of the attack.