Backing up bios into a .bin file

I have a dell venue 11 pro 7140 with that keeps rebooting with the asf force pff error and from the forums i read, i understand that my me component of the bios was corrupt and that am suppose to find a copy of a .bin file for my exact system then wipe the .me data and flash it onto my bios chip.
Now the only problem am facing is accuring this .bin file and the only hope i have is backing up my own bios so that i can clean up the me data then flash it back but am having a hard time finding a software that can backup my bios any advice?