It wasn't hard, I took a ATI DVI to VGA adapter cut the plastic off (pretty easy)
I did try to first bend it with heat, as the middle part is just soft plastic and wires, but in the end several wires broke off, so I just finished cutting it apart and re-wired it.
I used the original Apple adapter and continuity meter as reference for wiring.
I also just went out and ripped open the original apple adapter, inside it is similar, wires, encased in plastic, wrapped in copper foil.
You could try to heat it and bend it, but make sure your bend doesn't stretch the wires, or you will be rewiring it also.
CompUSA has them in the Mac section or you can order it here. It is not a 90 deg tho. It is a pigtail. There are some people posting comments about the device, but i sue one at home daily for my 15" AlBook and have been using it for nearly a year now with no probs. the key is to make sure that it is tightly screwed in on the both sides.