Payless has been my best choice for size so far. I'm smaller, a size 10, but have seen the larger sizes on the store shelving. You can shop online but it's best to go to the store and see what they have in stock.
They have some very pretty shoes at reasonable prices that won't hurt your wallet. The only trouble I have is walking out with more than one pair every time I go.
Oh well, shoes, shoes and more shoes.