I'm 5'9" and have a 46" chest and usually get 3x or 22W in tops. I've found that some brands have darts in their blouses that enhance your figure as well. I've found them in K-mart, Lane Bryant and Macy's. And I swear, don't get anything that's likely to shrink because it seems like they always shrink in length and I just don't have the figure to be showing off my navel.
Can't help you with shoes. Mine are much smaller than yours.
Karen