Karlach (Barbarian):

• Bonespike Helmet – Purchased from the Voiceless Penitent Bereki in Lower City Sewers
• ✔ Bloodguzzler Garb – Found on a Duergar in the Underdark
• Bonespike Gloves – Found on Strangler Luke in the Undercity Ruins
• ✔ Linebreaker Boots – Found in Worg Pen in the Shattered Sanctum or Beastmaster Zurk

Gale (Wizard)

• Hood of the Weave – Purchased from Mystic Carrion in Philgrave’s Mansion
• Robe of Supreme Defenses – Sold by Ferg Drogher in Rivington
• Gemini Gloves – Purchased from Helsik in the Devil’s Fee
• Boots of Arcane Bolstering – Bought from Araj Oblodora in Moonrise Towers
• Cloak of the Weave – Purchased from Helsik in the Devil’s Fee.

Lae'zel (Fighter)

• Helmet of Grit – Found in the Szarr Palace
• ✔ Adamantine Splint Armor – Crafted in the Grymforge
• Gauntlets of Surging Accuracy – Purchased from Lann Tarv From Moonrise Towers
• ✔ The Speedy Lightfeet – Found in Blighted Village
• ✔ Cloak of Protection – Purchased from Quartermaster Talli at the Last Light Inn

Astarion (Rogue)

• ✔ Covert Cowl – Dropped by a Meenlock in the Cellar of Last Light Inn
• Elegant Studded Leather Armor – High-Security Vault no. 9 in The Counting House
• Dark Justiciar Gauntlets – Gauntlet of Shar
• ✔ Disintegrating Night Walkers – Dropped by True Soul Nere in the Grymforge
• ✔ Cloak of Cunning Brume – Purchased from Mattis in Last Light Inn

Swiped from here.