How can I get my hands on the berserker helmet?

Hello, fellow citizens!

I'm currently on the hunt for the Berserker helmet as stated in the title. I'm also on the hunt for the Mandible sandcrawler helmet. Where should I search in order to get my hands on these, if they are still avalible.

Also, for the berserker helmet, are hurston deliviry op contracts still a thing?

Many thanks in advance!

(Upper picture, mandible helmet. Lower picture, Berserker helmet)

https://preview.redd.it/3hav5icygsnf1.png?width=400&format=png&auto=webp&s=a1c36888aaa0c73b40601a7ec8bb875768c1cdd4

https://preview.redd.it/6jjbcgi0hsnf1.png?width=169&format=png&auto=webp&s=b2aabdd99f8438344972cf51461c9a6b633b6e72