I bought a black cardboard sheet and made a first box in 3 parts. It didn't look so good as I thought once built, so I used the 3 parts together as reference to build a single part for the box, the result was better.

Still, the cardboard was too thin, it could have look a lot better, even better if creating a model using a 3D printer, but this is what it looks using only 2 hours of my time and looks pretty good.