Question about Mission Pass/Gold Pass

Are the cosmetics in the Gold Pass portion exclusive to the Gold Pass and are they never coming back? Having a hard time deciding between the game items or the vanity stuff. If I'll be able to get them some were in the future I will probably skip out on them.

You can also check player shops too, if they aren't expensive easy choice. I am sure they will at least pop up in fresh finds though, albeit randomly.