Nexus 7 nakasig/tilapia
I'm the owner of a Nexus 7 nakasig/tilapia (2012 GSM version).
It seems it's a deprecated device, on the list of previsouly supported device https://developer.ubuntu.com/en/phone/devices/devices/
Does one know where are the old images ?
I own one also but since I also have own newer Nexus devices I will focus on using them.
Given the age of the 2012 devices I can't imaging much reason to open any new development and any system images that you do find will without doubt be full of bugs.