Farming Mk 3 Sienar Holo Projector

Many characters in the game need gear "Mk 3 Sienar Holo Projector" in extreamly counts. And this gear is very hard to farm. I think it will be a great idea that those holo projectors should be available on guild store. Or those gear should be possible to farm from one of the Challenges: STR gear, AGI gear or INT gear challenge.