OK....after much wrestling and a whole lot of swearing here is the helmet.....it is not unfolded so if someone wants to have a crack at it please go ahead....i would suggest a hieght of 280-290mm when you scale it.
http://www.hirgon.com/Pepakura Files/Aliens Marines/helmet_h1rg0n.pdo
Cheers
James
http://www.hirgon.com/Pepakura Files/Aliens Marines/helmet_h1rg0n.pdo
Cheers
James