Chain Mail +3

Chainmail+3 is the second best piece of armor for bards and the best if killing Drizzt is out of the question. It can be gained as loot from Baresh when the party returns to Ulgoth's Beard after successfully finding the logbook of Balduran and talks to Mendas.

In-game description
"This perfectly crafted chain mail is the standard armor of deep dwarf elite fighters. It is comprised of mithral alloy and offers protection from all but the most determined attackers."