There is an art foundry in Madison called Felion Studios. It's run by Alisa Toninato and features cast iron art (get it "felion" = "iron lion?" Clever, eh?)
One of their signature items is cast iron plates made in the shape of the states.
They are pretty cool looking, and expensive at $600. That shape is not all that useful, either.
Unless, of course, you live in Wyoming.