A Hood for Janus?

Hey all! I've come across a really dumb problem... the back of my beloved Janus is nonexistent.




Sorry the  pics are so large. I have no laptop and  have been using my Kindle to frustratingly post this.

Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.

I'm not quite sure how to fix this. Is it possible for me to put it on a balaclava? Or maybe make my own hood? The jaw is seperate from the head and I haven't made a neck yet so maybe that's a better option...

Thanks for helping!