I spend some time to make a custom insert for Terraforming Mars, I just dislike all those tiny baggies! Everything fits neatly into the box and I just love the boxes for the Gold, Silver and Copper resources. Its so satisfying to align them all inside :D. I also enjoy that the cards are at an angle, makes shuffling unnecessary because you can just pick a card at random. Really happy how these came out.
Are those 3D printed and if so, can you share the files?
Plenty of them on various sites, like this one I found yesterday.