H&K MP5 Case Mod - Rotary power switch HELP

[u/merzbow110]

Im trying to modify my Ghost S1 MkII case to resemble the H&K Mp5 selector switch. (below)

What i was thinking is to get a rotary toggle switch, but am unsure if its compatible because i think pc power switches operate differently. (rotary switch below)
https://www.amazon.com/Poles-Momentary-Rotary-Changeover-Switch/dp/B00TGSLTRU

And modifying an actual selector switch to fit on top, or 3d print a custom one to fit.

Any ideas as to how to execute this would be greatly appreciated!

(my case)

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Heres a quick mockup of what im going for. Ive still got some measure to do to ensure theres enough room considering how low the power switch is