At work we use a number of the Decimator.com Video adapters. Regular practice is to use Velcro to mount them on a wall or in a case. But people with 3D printers can do better!

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MD-LX, will fit, not sure about other smaller models

The model requires a little bit of flex for the Box to slide in, I used Matter Hacker Pro-Nylon and it works great for this.

I printed this flat successfully, no supports needed. But for some more strength it should be printed on end with the small tabs to the top.

Counter sunk holes for using wood screws to mount.