Since RotHC, loot drops from 55 HM FPs are random as far as I know. The only exception is the last boss of czerka core, which always drops an implant IIRC.
Almost completely wrong.
Drops from the bosses in 55HM FPS are random, however the bonus boss and last boss have a set location where the randomized drop can pull stuff out of.
Also all drops in Czerka Corporate Labs are randomized.
Now go here: http://dulfy.net/2013/04/14/swtor-le...gearing-guide/
And scroll down to the Black Market/Arkanian section.