Wanted: plastic document boxes (Juneau, Tee Harbor)

I found some of these plastic document boxes at a Juneau thrift store and I can't find a source where I can purchase more.
They were made by Miyasho in Japan.
These are the exact ones I am looking for.
I realize that very similar ones are available online, but these are the very best I have found, and I've tried them all.
I presume that this company is not making them anymore.
If anyone has extras of these I would love to purchase them.
They are about an inch thick and just fit standard 8.
5 X 11 printer paper.
The image shows what they look like.
If it doesn't say "Miyasho Products", I'm not interested.
Please call or reply to this post.
Thanks!