Hmm well it should be hard to find an Edge now. In fact there is no fake of an Edge, but there is one for the iEdge.
The iedge is the one thats gets now produced and is for all kinds of DS.
From what i can tell the real iedge is white with a colored Edge sticker. It uses the same old packaging just with some stickers added.
The fake one is black and uses the same packaging bit with iEdge written on ir also the band says iedge.
you can see pics of the fake iedge at the fake Edge site www.edgei-ds.cn