Visiting the Guild offices on Deshima was actually not a complete waste of time. I managed to get a hold of a recent image of Mavros.
Still looking just as smug and slimy as I remember him. Name's Paion Mavros, Cretan crime boss, big in the artifact trade. Picked up most of the remains of Pedro Bardiche's smuggling empire after that son of a bitch met a sudden and unfortunate end at the hands of yours truly. I couldn't figure out where exactly Mavros is lurking at the moment, so I'll leave flushing him out into the open to you. Like I said, he's a slippery bastard. He usually leaves doing the actual business to his henchmen and he spooks easily. So, whatever you do, don't make it too obvious. If he bolts, I might not get another chance to bring him down. But don't take too long, either. If he finishes up whatever he's in Kusari for, he'll head back to Crete and be out of my reach, too.