Ghosts balaclava has always been around....
have a look at a navy seal.
http://lmgtfy.com/?q=navy+seal+balaclava
the C.I.A, S.A.D guy's invented it from what I hear
the one thing about COD I hate was that they ruined the Skullaclava now every new player is showing up in multicam pants and a grey soft shell with a cheap (mostly those glow in the dark ones) balaclava with the Seal skull print on it. I wore mine waay before that game and it was unique, now it's in a bin with a bunch of my other gear cause everyone either shouts "ghost!" or calls you a COD fag for wearing it...../rant
anywho check out the 506th I believe it is, or the 405th, their websites dedicated to making Mjolnir armour, the other one is stormtrooper armour I get the two mixed up, they'll have it there no doubt.
however the design he wears is painted on, right on the front of the helm, cool in a video game but would no doubt block your vision in critical areas. I painted a white eye design on my ESS advancers and left unpainted strands to look like I had bloodshot eyes but the veign's were black, a metaphore for a black heart or the oil pumping through my veins, very cool I designed it so I could see through the pupil and some of the veigns ran along my vision path but it still was very fuzzy.