I would suspect that any number of items from the Mazda3 could be made to fit, considering they share the same basic chassis and general layout.
Then again, the thing hasn't been out very long either, and production does take a little time. So patience, friends! If nothing comes out by the end of the year, though, then I'd start to complain.
On a side note - wouldn't one of these things just be a hoot with the MazdaSpeed turbo engine?
