Wolfman Jack held one quite a while ago. A human-Cylon and a Centurion arrived, but the toaster had issues with the microwave and things didn't end too well.
If you find one, I hope it goes better.
www.byyourcommand.net has some images of a Halloween centurion the owner (known as GoldCylon here on CF) went to a party in. Dunne whereabouts on his site.