Cmdr mapu51dan here, I have been in the search for gaurdian stuff a long time, me and my good friend Guru-951, pretty much combed the whole area around and close to, regor sector, the gaurdian bubble, thier home world would be GammaV, since its a WR, 1 and 2 it's nice and hot for them, they liked heat, not like the goids.
The cete entry was an interesting one at that, went out there too many times to count, literally found nothing, maybe I'm not looking hard enough, but I mean given how many jumps back they said, we where sure that we had fallen into this world that took over the ships pa system. Have you tried to decyper the symbols on thier objects? Has anything come of the cmdr who recorded musical notes from the obolisks?
I have a bunch of theories as to what happened and where they are, but the permit lock kinda defeats the point of discovering more about them.