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.





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!