These are the add-ons that I made for the Syfy (now Amazon) Expanse helmet (https://www.thingiverse.com/thing:2127463).
Lense Covers are printed in Novamaker Clear PETG.
Face Jets are printed in whatever you care.
Stickers are all cut out using a Cameo cutter (I expect that cricut or others would work as well) . black_double_slant.svg overlays slanted_yellow.svg
The Stickers are a lot of work to weed, but I have added weedlines to assist.