Rather expensive (I bought new), but I bought a pair of Lanvin wedged ballet pumps a few years back and they are still going strong (obviously, I have them resoled, etc). If you are not scornful and haven't got size 8 feet like me, Ebay have a lot of Lanvin Ballet pumps on auction at the minute. Obviously, you would have to ascertain is any are "wedged" or not. Not that I've looked, but I haven't noticed any other wedged ballet flats about. But they must be out there (as the Lanvin ones are generally very expensive).