Drone Synaptic Relay Wiring

So I’ve just recently returned to the game, and have been going though all the BPO and BPCS i’ve got in my stations,

i have a bunch of Augmented and integrated drone BPCs, where do you get parts for these ?

i killed a bunch of mission drone and got nothing, and salvaging them only gave normal salvage.

faction spawns from drone sites is one place I know

ok thanks