You may be able to replace just the holder. But it does look like the actual steel runner is molded into the holder and it looks like there is only very minimal steel there to be used/sharpened. After all, steel is the one, single most heavy item on a skate so the less of it you can use the lighter it will become.
However, with each holder being designed specifically for the player its intended for, that makes having extras that much more difficult and expensive, even if it can be riveted to the existing boot.
Bottom line is these skates are meant to be a disposable product only to show what can be done if money is no object and to get these athletes through the Olympics. While its possible the pads and protective may be able to continue to be used after Sochi, I highly doubt Bauer will continue to support the skates due to the cost and lifespan of the holders/runners.
