Obviously you'll need to measure your space. We were lucky enough to have room for one whole and one half unit in the corner.
Initially we thought about using a few of the units that already sit flat for wall or floor storage, like these:http://www.ikea.com/us/en/catalog/products/20087525
but when we went to Ikea and took some measurements, we ended up with two of these instead:http://www.ikea.com/us/en/catalog/products/20114878
My guess is that any of these would work out, though you may not be able to mix and match if the heights and depths don't align.