I have some used cases that look like Pelicans, but don't know who made them. They look really tough.

For some folders I picked up a $20 aluminum technician's toolcase at Lowe's with scored foam insert, reminiscent of a ZeroHalliburton case but probably much flimsier. I have two 6x9 folders, a spotmeter, a regular meter, a rangefinder and several filters comfortably in it. I think I would trust it for being knocked over but not dropped from a plane. The molded plastic ones above will take alot more abuse (and already have before I got 'em).