I found the Dominion Card Cases and loved them - but I use normal cards and I don't sleeve them. So I resized the cases from Demod.
The cases can be printed in a single print. I do so on a glass bed: This results in smooth cases - very nice! I use for each extension an own color.
You can use paper labels and glue them on the cases (see last picture) or print plastic labels like I did.
I uploaded the labels STLs - the labels are in German.