Heya JUST JOINED AND GLAD I COULD HELP OUT SO QUICKLY! okay I don't have one for sale but I DO have and Idea for what you can do to build your own!
I was going to do this for my Strength cosplay for Anime Boston.
maybe if you have the patience you could try this
and then i guess spray paint ? or just paint it black and cut out styrofoam pieces ,paint them and add on!
just using some creative ideas! hope this helps you! -^_^-