I bought a bunch of these from Staples a few years ago and when I moved I needed two more to fill out a wall.  Staples claimed to have them and then said they didn't, but somehow in the process said they would have been supplied by Wayfair if they HAD had them.  So I went to Wayfair and found exactly what I was looking for $20 cheaper than I was going to pay at Staples.  They are so easy, just take all the packing material off pull the sides out and let the shelves drop!  And the plastic connectors for stacking shelves come out, so if you are only going 1 high, you don't have to worry about them looking funny, just pull them out.