Quite honestly, you'd just have to buy a full latex suit and maybe paint that allows movements, or buy a black latex suit and buy a white one, then cut the areas in the black suit where the white should show up.

Then glue the metal bits of Valkyr where they should be.

It might cost around... 50$, if you find the right ones. Hopefully you're luckier than me and you aren't allergic to latex lol