Someone have a link?
I know that the brand "Hama" made it some time ago.
Thanks for your help! :)
like this?
https://www.nierle.com/en/article/2707/Prodye_exclusive_DVD-Cases_Mini_8_cm_25-pack_black.html
I find more or less used for free at recycle shelves near my House.
I put digi CD:s to those DVD cases and normal jewel cases.