I've often considered that myself, being a 13w/14 mens size. To me, I don't really feel that I'd want to wear heels, that's just my shtick being as tall as I am, but as for normal shoes, I know a bit of jiggerypokery and crafting can turn a pair of mens boots into a nice pair of women's boots. Then again, not everyone is experienced with amateur shoe cobbling, so finding a site can likely be helpful.
*wonders is she should start making shoes for people like her...*