Bone Hora

Pugilist's Arm, item level 5. Equip level 5, PGL MNK.

From 24 Nothing to See Here and 1 more quest.

From quests

24 Nothing to See HereChoose one of 4
25 Harder than RockReward

Other databases

Eorzea Database (the official one, on The Lodestone)
Console Games Wiki
Garland Tools (vendors, crafting, drops)