2 bucks a pop per electrical box is too expensive. That would be over a grand for the floor.
I'm thinkin wood ... Namely 4 foot and 6 foot 1/2" segments that will be bolted together and jigsawed to fit. If not, I'll send Chuck Norris to stare the floor into submission. I'll upload some doodles of what I'm thinking.
haha, I said wood.