Captain America Avengers Cowl Question

[rockeagle2001]

Hi all, I have a question regarding the Cap Helmet. I already have the helmet. however, the thing i lack is the sorta like the cowl underneath it, that i can attach the ear pieces and helmets to? Does anybody know how to do it? Can anybody point me in the right direction regarding this?

 

[rockeagle2001]

bumpy, bump.

let me know guys! what should i use underneath the cap helmet? an open face balaclava? how can i attach it to the suit to make it whole?