BlueSHO thought the dims were the same. I found the XSport assembly for $61 (also in the link above).
I actually ordered the SHO part the other day (~$103 after shipping), so if someone wants to sell a used one soon, I can return the one I just ordered. I would, though, like to keep my original piece in case I need to swap back to OE quickly for warranty work.
I will confirm whether or not they are a direct swap as soon as I can.