As an option to the 120$ aluminium lid fro gorite, you can print the lid yourself or bring the file to a 3d printer shop.
We made 4 SDI-holes, so it should work for the magewell card too, we use the one-IN, one-OUT card from blackmagic.

All you will need additionaly are 4 metric screws, M2 x 35 (2mm, 35mm long)
Frame3.jpg (777kb) downloaded 4 time(s).

download here:
3D file and pictures