According to the author August Ragone, who wrote the book Eiji Tsuburaya: Master of Monsters has seen it in a Japanse import toy store with his own eyes.
It was basically a regular Max and Miria Takatoku box that is housed by an outer carton box much like a trayish style.
Of all my years for collecting vintage 1/55 Macross, this is the hardest to retrieve of them all.