I've seen lynnJonathan's "M3 MarsSuit" and that's pretty close to what I want, but it seems to have been taken down.

I've seen Daz's Space Suit. It is the most retro one I could find, but it is too modern for what I want.

So I was wondering does anyone know where I can find some retro sci-fi space suits? I've seen people using them in renders but I can't find them anywhere.