has created a backup copy of the official firmware.
if you need someone you can download by link http://4pda.ru/forum/index.php?s=&showtopic=897494&view=findpost&p=73548124
I also ported TWRP and successfully received root access: http://4pda.ru/forum/index.php?s=&showtopic=897494&view=findpost&p=73636702