errors updating bios for Latitude E6520.

Hi

I've installed and run Dell client system update on my Latitude e6520, just passed to my from a colleague,

This is recommending I update my bios version to A19 from here.

http://www.dell.com/support/drivers/us/en/04/DriverDetails?driverId=6P6DH

however I get an error telling me to update to A08 first when I run this.

But I can't find A08 on the support site for download, earliest previous version listed on the above link is A12

Can anyone point me to an A08 download for this machine??