This might be something to ask Amazon’s Rufus AI about. I’ve actually had success describing things like this and it finding what I’m looking for on Amazon.

You may also check Thingiverse or another 3D printing website for parts for “airsoft helmet” and if you can find it, like this one www.thingiverse.com/thing:2799476 you can either search for similar terms on a site like Amazon or have this 3D printed by a friend or a shop or it might be your entry into 3D printing with your own printer to print this and other parts.