Blank customizable laptop skin?

My sister and I are feeling really creative and we want to somehow decorate the top of my laptop. I know there are sleeves out there, and I know we could cover it up with stickers and stuff, but we want to make it nice and neat, so we're looking for a blank universal (or 15.6 screen acer) skin cover (in white or any other color) that is made especially to be customized. Does anyone know where we could find something similar?