My characters were going after some Rebellious Droids (EV-8D3 and R2-B7 from "debts to pay" as returning villians) and decided to stock up on some anti-Droid weaponry. The Ion Cannon from the Core books is rather cheap and Nasty (for droids) but there was a suggestion of getting some Ion Grenades (which I have only seen in Battlefront and KotOR). I just took the Stats of the stun Grenade and replaced stun with "Droid only" ion damage
Far better then the Pathetic Gungan Plasma balls
I am just surprised there isn't anything official