1916 german helmet

could someone plz make a german ww1 1916 helmet like this.

http://filesmelt.com/Imagehosting/pics/7e123d5465ee804bd64e7f694c9480c5.jpg

as you can see, its slighlty wider then the ww2 helmet.
then could you aply the helmet to the dans dod german npc model? found here http://www.garrysmod.org/downloads/?a=view&id=57642