The cable on the picture is power/volume flex cable for new updated iPad 2. Like Joshua said when iPad 3 was released they updated the inside of iPad 2.
You should be able to find it on ebay. Here is one [http://www.ebay.com/itm/Apple-iPad-3-PCB-Ribbon-Flex-w-Power-Volume-Vibration-Buttons-4G-Version-/160809802843?pt=Other_Tablet_eReader_Accessories&hash=item257102dc5b|listing] but this seller is mistakenly stating that this is iPad 3 power/volume flex.
Hope that helps.