Actually, the arhok sets contains four items.
You would still be missing the shield and the sword.
The sword you should be able to find at the meditation chamber in the underground cities.(i believe you have to pull on some fountains.)
The shield can be found in a cave along the beach not too far from Illicor.
It's like watching a flock of clown-like apes trying to navigate a ship, even though the ship has in fact been stranded on some kind of reef for about 7 years and none of the apes have noticed it yet. -Drahnier on OD moderation.