KOTORII On Iziz. Where is the "droids head"?

I'm losing my mind. I've bought evevry item from the droid. and the guy in the cantina still says the droids head is missing and for me to find it. I have walked that place for 3 hours now and can't find nothing

Please. Someone help.

I thought you was able to buy it from the droid, but something is wrong.

EV Edit: Please take it to the already existing, currently established and well-versed Knights of the Old Republic II: The Sith Lords (Hints, Tips, Strategies, Walkthroughs, Secrets, etc.) thread.