Similar to what we have seen with other Nexus devices, Google has recently released the factory images and binaries for the Nexus 7 LTE tablet. These files are all available by way of the Google Developers pages and are listed as being for the "razorg" Nexus 7 2013 Mobile. The files are listed as being Android 4.3 and with build number JLS36C.
Nothing surprising in terms of the version and build numbers, and in the end this basically means those sporting a Nexus 7 LTE would easily be able to roll back to the original stock setup should something go wrong while they are playing around.
Those looking to download all the files ahead of time, just in case, should be looking for four downloads in total. The factory image is just one file and there are three files listed on the binaries page. That one includes one file from ASUS, one from Broadcom and one from Qualcomm. And just as we always see, all files have an easily found download link along with checksums to make sure you are all set.
The ASUS file deals with audio and sensors, the Broadcom file deals with NFC and the Qualcomm file deals with a variety of items. These include graphics, camera, GPS, WiFi, Bluetooth, sensors, media, DRM, DSP and USB. But in the end, it may not be as important as what each one does -- more so that they are available if needed.
That being said, while the Nexus 7 LTE did disappear from the Play Store, a quick check is showing that is is back in stock and available to ship in one to two working days. And just to clarify, things remain the same with the Nexus 7 LTE being a 32GB model with a price point of $349.