You might be able to spot them in the Czerka office for a moment before they run. If you haven't finished the main quest missions on Citadel Station you can just lie to Grenn about killing them and do it on the surface... or wait to meet them on the surface and then tell Grenn.
My backpack's got jets. I'm Boba the Fett.
I bounty hunt for Jabba Hutt to finance my 'Vette.
I chill in deep space, a mask is over my face.
I deliver the prize but I still narrow my eyes
Coz my time I don't like to waste. Get down.