I would go to the Fender site and get a contact #. Call and find out how to get a new neck. Fender will probably sell you a new neck either direct or through an authorized service and repair place. They will want the serial # of the guitar most likely. My understanding is they don't sell these parts to just anyone. I guess they don't want people putting there neck on someone else's body or something. Anyway try and call them first.

Good luck.