So all the SIDS literature says that there should be nothing in the cot except baby...so why is it so hard to find just bottom sheets. What's the point of a whole set of sheets (bottom, top, pillow case...sometimes even a bumper) when you aren't suppose to use any of this stuff. For what it's worth, I did manage to find some "only bottom" sets in packages of 2 but they are plain and I'd love some of the cuter stuff with prints but these are all in the sets.