After randomly searching DealExtreme i found this. It's a great price for anyone wanting to change the case for their GBA SP. Only £2.15 and makes the GBA look brand new again! Worth a try
Available in black, white, silver, blue and pink :).
"Pros: Good built quality.
Very complete, mine came with the hinge and a little sticker with Nintendo on it to put on the top flip thing that i have no idea how to call it rofl.
Cons: None that I can see so far.
There might be a difference between this one and the official black, my SP is silver so i dont know.
Other Thoughts: Very good replacement, for a very cheap price.
Buy it now, you won't regret it!
Bottomline: Buy it now, you won't regret it!
Don't forget to read guides and tutorials on how to casemod your handheld if you want to make sure not to break it."