Dunno if it's still there, but last time I was in Japan, they had it complete-in-box in the display case at Beep Akihabara. It was VERY expensive, though -- like over $200, IIRC -- which suggested to me it probably wasn't going anywhere anytime soon.
If anyone is in Japan right now, or if you happen to be there, and you're willing to pay that kind of price, I'd recommend checking it out, as the condition of the game looked to be damned near perfect.
(They had Fire Hawk CIB too, for a similar price -- I was so tempted!)