Thanks SS and Sterneglanz. After some more googling it seems like these are not widely available. Bummer. Some of her bags and other things showed up on ebay... maybe they'll make it there at some point
To the folks who are saying the shoes look uncomfortable, if you don't like high heels, then yes, these wouldn't be the shoes for you. But if you wear high heels, these are really no different in terms of feel whilst walking. In fact, they feel closest to wedge shaped heels-- they are actually more stable than regular high heels. I think people just get confused by the "free space"-- the floating is an illusion after all, albeit an effective one!
N.