This web publisher has been around for a while, but this is the third incarnation/ISP of his website (click on free download service):
紙の穴 - たった一人の模型メーカー
Aside from the old models (like some from the Kizuna/Avenue website) he's added many new ones which now need passwords, which you can find after watching the accompanying video.
I didn't find his old T6 Harvard glider I was looking for, but I found a Brewster Buffalo and Polikarpov I16.