This is just a thought I had, if it says it can be found in Port Bastok it is probably sold by someone a vender that can only sell it if Bastok has control of the region the mountains are in.
PLD66/WAR33 Was running from Boyahda Tree, killing the Goblins and Golems as I went along, then when I got into Meriphataud Mountains, near the Sauromugue Champaign zone, killed four Hill Lizards, and got drops on the first two I killed. Goes for 1,000g on Cerberus Auction, sells for 300g at Vendor.
Meriphatuad mountains...sit there for a while and kill Hill Lizzys....if you got anything other than thf your gonna be there for a while....lvl 30RDM/BLM chilled for like a half hour straight killin Lizards and Gobs....finnaly got one earing
These can typically be bought for around 1k each on Unicorn, in the various Auction Houses around the world. Not bad, 100gil expense for every earring. Cheap fame.
I am going to guess they do not. I have never seen one dropped from a lizard in the Dunes since the PC version game out in the US. Just killed five lizards in the Mountains and got three of these earrings, however.
You can turn these in in Windurst for the Twinstone Bonding quest the first time is a Wrapped bow and everytime after is 900g pretty good if you have a thief and nothing to do