Google has finally released the factory firmware for the LTE version of the Nexus 7 (2013 edition).
The factory image will help users to restore their Nexus 7 (razorg) to its original state. The bits have been posted on the Google Developers website and are already available for download.
The current firmware is listed as being Android 4.3 build JLS36C. Check out the link below to grab the bits.