Any alternative to official link? The official link download a 80 mg ipsw.
http://appldnld.apple.com/iOS8.1.1/031-09999.20141117.EL2Tn/iPad3,3_8.1.1_12B435_Restore.ipsw
http://appldnld.apple.com/iOS8.1.1/031-09999.20141117.EL2Tn/iPad3,3_8.1.1_12B435_Restore.ipsw