I emailed Parts Express and they said: "There will be some 4-ohm, non-shielded versions in a couple months. They'll sort of be dressed up as car audio drivers, but are essentially the same in construction as the regular ones."
the debucked 7" is 2 7/8" deep. dayton should have done this long ago but probably never expected so much demand from the car audio community. the debucked versions should be cheaper in terms of shipping costs (lighter) and actual build cost (no extra shield or magnet). im really looking forward to them, sounds like they're gonna 'dress' them up a bit, i hope this doesn't add too much to the cost, they should cost LESS than the originals.