So I've nearly dropped the "new" iPad a few times when the magnets haven't proven strong enough to keep the smart cover hinge attached to the iPad. Does anyone make a nice rear clamshell cover (for the iPad 3) that also "locks" the smart-cover hint against the body of the iPad - to prevent accidental separation??...and also has decent corner protection... I had one off e-bay that did this on the 2 - but the material was quite brittle/weak and had numerous cracks after a few altrecations with floors/doors etc! Thanks!