I'm trying to find a certain shoe and am unsuccessful...

I have seen them before but am having no luck in locating them now that I actually want one. Its a loafer type/flat type shoe that is black with a kind of material on the outside that is not canvas but softer and thicker. I have seen them with plaid on the inside and they are usually square toe-d. I have big feet too so shopping at payless or shoe stores has been unsuccessful, if you have an online shoe store that would be more ideal. Any ideas??