I designed a spinning carousel for my filament samples. There are 36 slots for your sample cards, business cards, credit cards or whatever fits in it. In the file "cardholder_v4.stl" the slots are 1.1 mm thick. In the file "cardholder_1.2mm_v1.stl" the slots are 1.2 mm.

If you want to use my filament sample cards

https://www.thingiverse.com/thing:4050941 or https://www.thingiverse.com/thing:4046311

I would recommend to print the 1.2 mm version because with the 1.1 mm version it's a tight fit. (probably because I've printed it in PETG) If you want to use it only for business card, the 1.1 mm should be thick enough.

In both files there is a hole on the bottom for a 608 bearing.

On the platform-file the pin for the bearing is 7.9 mm.

I included the Fusion360-files if you want to modify this thing.