Addon that contains models already in game with helmets for CS:S and HL2

All in the title ^
(where do I get?)

PAC2 if i understand what you want correctly…
http://www.facepunch.com/showthread.php?t=887940

No, I mean MODELS for Metrocop mask and CSS helmets for use in PAC

You don’t get them because that’s called warez.

Which is illegal.

Hexed helmets.

There is a Metrocop mask model in HL2, the one that Barney uses. You can just find that model.

And maybe you could post a request in the modelling section for the helmets?

Still illegal if any part is from any other game.

Why? The models would technically be custom made, and the materials needed wouldn’t be included.

-snip

Tell that to the gazillion model ports in Models/Skins.