Just spam trade, there are dozens of crafters for those. If you don't find one you can send your mats to Saass (imp) or Freight (pub). Tips never required but never refused.
I looked around for a while for someone to make me those new HK parts and eventually just learned them myself. I can craft the following:
Assasin Droid DT-12 Motor
Assasin Droid DT-12 Parts
Assasin Droid DT-12 Sensor Unit
Assasin Droid DT-13 Core
50k a craft