Tomi: Forged Documents. They are found in the Wagon Repair Shop in the Beggar's Nest. Result: Ring of the Rogue +1. +1 dex, +1 disarm trap, & +1 unlock
Daelan: Brooch. Found in the Chest on the Bloodsaber Pirateship in the Docks District. Result: Talisman of the Uthgardt +1. +1 str & fearless.
Boddyknock: Leaven Bread Recipe. Found in a Barracaded House in the Beggar's Nest. Result: Ring of the Laevan +1. +1 charisma & +1 regen rate.
Grimgnaw: Silver Ring. Found in the Blacklake: No Man's Land section, in an abandoned house. Result: Amulet of the Long Death +1. +1 con & +5 spell resistance.
Linu: Chalice of Moonbow. Found on the second floor in Melderan's Mansion in the Blacklake District. Result: Necklace of the Elf +1. +1 Dex/Darkvision.
Sharwyn: Celestial Elixer. Found in the Bedroom of Lady Tanglebrook's Estate. Result: Performer's Belt. +1 charisma, +1perform, and +1 persuade.
Yes, you can get all these items. Also, you can level up a henchman to a level below you by asking. Of the Henchmen, Tomi, Daelan, and Sharwyn are the only ones that show a change of appearance so far (Daelan looks meaner, Tomi looks cool, and Sharwyn is the only person in the game that can make +1 leather look good
Enjoy!
Aethir Kross, Paladin of Lathander