i'm having the same problem with certain items. I'm trying to get every other item before bothering with pitchforks, but i cant get Horror Head II, Trick Staff II, and Treat Staff II. I've traded all kinds of sweets to all kinds of NPCs, but all i'm getting from anyone is a costume. I cant figure out if only certain NPCs give certain items, or if it's just random and I have to keep trading. Maybe i'm glitched or something. If anyone remembers exactly what sweet and NPC they used to get one of those three items, please let me know.