Ok, well dont bother with scientists then. Those are mostly used for the junk that makes RE chance bits. So are dantari.
This site
http://www.swghuntersguild.com/JunkYard/ has a larger listing than the action-inside site. Both will tell you where to find specific types of junk. So just head to the general location on that planet and kill anything that walks.
For stat clothing, the usual spots are good. Enraged rancor drop the most, but for larger percentage of high stat items DWB or Rebels at Nashal.