But wait, iPhone5Mod comes to the rescue with its replacement aluminum iPhone 5 panels. In fact, the replacements being offered are the iPhone 5 panels Apple uses for its smartphone, not an imitation, according to the seller. Perhaps that is why the part is priced quite high, at $99 apiece.
Of course, attempting to replace the damaged back plate of your iPhone 5 is no easy task. Therefore, it is advisable to seek professional assistance with the process, unless you are confident you have the necessary skills and equipment. Oh, and it goes without saying that doing so will void your warranty, so keep that in mind also.
source: iPhone5Mod via 9 to 5 Mac