I've been looking for a while to get a detachable smart cover for my iPad - I have the Smart Cover-compatible back already but have had a devil of a time finding a smart cover that's just the smart cover - I've tried the Apple ones and they're way too expensive for what you get. Do you have any recommendation for a non-"Smart Cover" smart cover that's would work? Or maybe a smart case that has a detachable cover? Those magnets get heavy after a while. Thanks!