Anything star wars-ish would be amazing. Perhaps:
Vader helm, as mentioned above
Storm trooper set a la PL centurion
Sabers could be vanity shield
Ewok pet
Yoda ears (must be slightly hairy)
Fett helm
Vader cape back vanity
Leia honey bun hairdo helm
Solo vest
Chewbacca bandelero back vanity
Skywalker robo hand (malfunctioning w/ sparks)
Baby Jabba pet
Emperor teeth
Prequel Jedi fancy lad side braid
"it's a trap!" bug eye helm w/fish lips
Glowing tauntaun intestines back vanity