What is a good hard plastic case for snowboard?

What is a good hard plastic case for snowboards? Southwest busted the one I had by slamming it against the side of the airplane. Does anyone make one that the airlines can't tear up or are they all just disposable. My uncle used to have a metal suitcase he would check British Airways caved it in and busted the lid. Im afraid of the soft bags because if they get it in a bind there is a chance of them breaking it.