PCI/ISA/AGP Card Holder

I have at least 100 PC cards and I've been putting them in boxes but it's hard to find what I'm looking for. The other day I was watching a YouTuber and noticed he had something holding a bunch of cards so I searched and didn't find exactly what I was looking for so I made this. 

It will hold PCI, ISA, and AGP cards standing up.

Edit: Update to extension for long ISA cards. Prints in 2 pieces. If you don't need the extra you can print either of the main files.