You can find the elevator package on the asset store here:
The Elevator Package allows you to quickly and easily create elevator paths for your game!
– Constant speed, slerped, lerped, smoothdamped and rigidbody movement between targets.
– Support for multiple waypoints.
– Quick setup for a simple two-point elevator system
– Stop at all waypoints, stop at certain configurable waypoints, or don’t stop at all.
– Center elevator on any waypoint with the editor tool.
– Manual as well as automatic setting of waypoints.
– Triggering system.