iFixit is now offering a Transparent Rear Panel kit for the GSM iPhone 4 and iPhone 4S.
The kit includes a Transparent Rear Glass Panel, a “Liberation Kit” with two screwdrivers—one for Apple’s pentalobe screws, and one for standard Phillips screws, along with two Phillips replacement screws—a screen protector, and a Thirsty Bag designed to absorb water from a device that’s been accidentally exposed to moisture.
The Transparent Rear Panel Kit is available now in limited supplies for $30; once supplies are exhausted, iFixit will continue to offer the Panel by itself for the same price.