It seems to drop only in Frontier Mountains now, it used to drop in Droga and Nurga but apparently this was removed with the revamp. After cleaning most of Droga without finding any, I got 2 in Frontier Mountains in the room at -1850, +1750 where Soothsayer Dregzak spawns.
-- Sir KyrosKrane Sylvanblade Luclin (Veeshan) Server Lord, Lightbringer, and Redeemer in the service of Erollisi Marr Master Artisan (300 + GM Trophy in All) Master Fisherman (200 + 5%) and maybe Master Drunk (2xx + 20%, too drunk to tell!)