I made a 3 x 5 cordura card holder similar to the Maxpedition one and have it in my Flood rescue kit for work. I fancied something smarter for EDC but the leather one I made just didn’t look as smart as I wanted. I found two Levenger shirt briefcase on eBay, they were embossed with Bank of America but I’m not concerned about that. They arrived today and I like it a lot they’ll be perfect at work. The 3 x 5 cards I got are not great, thick paper really, but I’ve bought different ones from eBay (I really spend too much time there). They were called Bristol board so hopefully they’ll be a little more rigid.