That is PURE own.
From what i've seen, and im about to complete the same thing you want to do, is that the borders for the bottom screen come off but the top ones do not. I haven't completely swapped between 2 ds's yet, so i cant be sure.haha, i was thinking about buying a black ds lite replacement case to mix and match parts with my ice blue ds.
the outside would be all ice blue and the inside black. and the screen borders and buttons would all be ice blue. or maybe.. a ghost case with LED mods