Physical version is sold at the shop in Japan. But this mail order site can only be purchased in Japan.
https://beep.theshop.jp/items/9508743
https://beep.theshop.jp/items/9508768
If you want it, you can trade by sending an e-mail directly to the shop.
(The delivery method is EMS, payment is paypal)
You can order the physical version of the game and soundtrack.
This is the shop's e-mail adress.
[email protected]
Thanks.