Costco, sam's club, bj's, home depot, lowe's. they all have comparable shelving. best way though, is build your own. then you can customize it to your needs. i keep telling myself that i am going to bring some steel home and weld up a shelving unit, but i'm too lazy to go through all that work after a long day at work. so i'll probably end up with something like Lynn has, but with steel grid shelves, for the weight capacity.