Working for an Airline with nearly a 190 A319/320's A/F Vibration is a daily occurence, however once the Vib reporting sheets are accurately filled in and passed to Tech support they have a very neet programme that can identify the exact area. Yes most of it comes from replacing the Elevator & rudder eye ends and or Hinge bearings. Also the Ailerons can be of major concern, and once again PCA eye ends but more often than not the Aileron 'A' frame bearings are worn. Not the easiest job in the world as the Ailerons have to be removed, however it can all be done in a night shift if you know what you're doing.