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Would you class armed military vehicle crew as civilians though?
Nope, but...
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[...]miners/labour force that follow this sort of aesthetic; minus the weaponry
would seem to fit the bill.

They'd need adaptation, but those sketches are cool-looking, practical and distinctive sets of clothing that don't fall into the sci-fi trope of
super skintight clothing of the future.
Features like the diving bell style helmets; the shoulder/neck brace and the nehru-collared longcoats would fit in a variety of settings, from steampunk to Gothic to post-apoc; and from a practical point of view, having longer coats or bulky oversuits will make the models more sturdy around the legs, which'll lead to fewer breakages.
Basically, I don't like the idea of sci-fi civilians wearing modern-day dress, and would have no interest in them at 6mm.