The part where the leader of the Companions tells you to go kill those witches to cure him of his curse annoyed me. I killed all five and was stuck with 20 pounds of hideous heads in my inventory. Luckily I was able to get rid of two at the end of the questline, but I still have 3 stuck as quest items that I can't drop or sell.

Is there any way or am I stuck with them like I was with a few items in Oblivion?