i laser cut this out very successfully. It could possibly do with an extra 1mm on the height.
Depending on how thick the acrylic you use is you might need to take the metal front off the dive computer if you can’t bend it. I used 2mm thickness and I feel it’s an improvement on the original protector
I've added the LaserCut .ecp file which is the software we use here @DoESLiverpool. This has some tweaks to the design to try to etch down the tabs to size for the slots. This works for me but will probably be laser cutter and material dependent so be warned!
This thing was made with OnShape. Edit it online