+1 rapier at the starting merchants. Ritual knife isn't bad for the off hand bonus bless. Steelforged sword near the masterwork weapon questline (under the ruined house in the wrecked goblin town).
That said... I did a warlock playthrough as fiend patron with tiefling race, and took Wyll on two complete EA playthroughs. I can probably count all the melee attacks combined across all playthroughs on two hands. You're MUCH better off worrying about Lae'zel' and Astarion's weapons than Wyll's, IMO.
