There is, afaik, no ceramic nailbomb neck. Its an option I suppose, but when people speak of the ceramic nailbomb, its invariably a bridge. The neck is A5.
The neck you seek, and the only ceramic BK neck, is the Painkiller.
Edit: did I just imagine that you asked about the c-bomb neck? If so disregard the stuff above, except about the PK,which is the correct pickup for you.