i did the same thing with the session i ran, for lowhrick or however u spell it i used tarfil, for theVEX i used the proxy mini from force unleashed, for pash i used human scoundel, for sasha i used rebel leader from the hoth set, and for Trex i used trandoshan scavenger.
Human scoundrel looks exactly like pash. I couldnt find a good one for Mathus or Oskara though, id use maybe ayla secura but i dont have her.
For teemo obviosuly jabba the hutt. For the security droids i used basic battle droids. It would be nice if FFG would make SW minis but lookin at their qaulity of minis if they did they would be expensive and i think theyd only focus on main characters rather then swamp us with non uniques the way WOTC did.