You are incorrect, they are called Sensor fragments now, and you can get them from shooting and destroying Thargoid sensors (formerly UAs). I unlocked Palin in patch 2.4, so this was accurate on the 29th of Sept. Just go to any Thargoid crash site, should be lots of Thargoid sensors for you to shoot.
EDIT: The crash site I used was at HIP 17403 A4A -34.981, -141.413.
You are incorrect, they are called Sensor fragments now, and you can get them from shooting and destroying Thargoid sensors (formerly UAs). I unlocked Palin in patch 2.4, so this was accurate on the 29th of Sept. Just go to any Thargoid crash site, should be lots of Thargoid sensors for you to shoot.
EDIT: The crash site I used was at HIP 17403 A4A -34.981, -141.413.