Adam, you obviously have an item that will sell well if made available. Are you currently only looking for the people who will purchase the A1200 version.
I would love the A3000 version (I have 2 A3k's) but don't have an A1200. I would, however, purchase the A1200 version if it is usable as stand alone with some additional parts to fit the case.
Maybe a poll would help sort this.