The droid part schems are apparently gotten via daily commendations.
So if you aren't mindlessly grinding end game content, no new crafting for you.
And yeah, I don't think that's good design to force you to quest if you want to craft. But apparently TOR devs do, since they keep forcing that.
Actually those schematics are BoE. You can buy/trade them. If you're on Jung Ma I'll give you the schematics if you give me a discount (my Cybertech alt is only 330/400).
Shame on you GnatB for not researching the issue and spreading misinformation - why you'd think forums were an unreliable source of information