A lock driver for a lock, including a lock cylinder body, an actuation attachment portion and an adapter structure. The lock cylinder body has a front end, a back end opposite the front end and an outer surface. The lock cylinder is positionable and rotatable within a bushing. The actuation attachment portion extends from the front end of the lock cylinder body. The actuation attachment portion includes an attachment interface that is structurally configured for coupling to a user maniuplatable structure. The adapter structure is associated with the back end of the lock cylinder body. The adapter structure is structurally configured to interface with an existing lock structure.