Spanner, I was looking at the Halloween USA invasion pics and something jumped out at me about your girlfriends armor. Not sure what you guys are planning to do with the bottom of the corset that goes over her loin cloth, but if you put a couple pieces of armor on the bottom of that corset then I think that would come out looking SWEET!
Think of it like how a Fauld works on ancient armor. The fauld is made up of those 3 bands that are going over the abdomen in the below pic.
You could put one piece on each side, and with it being on the corset it could flex with her so she could move and sit down.
Anyhow, it's an idea that popped in.