Never heard the scroll bar called the elevator, but it is descriptive.
I doubt anyone has a problem getting from the bottom to the top of a page, or anywhere in between using any number of methods. The OP wasn't talking about that, if I read his question correctly. He wants to know who the originator of a thread is from any location in the thread, and more specifically from other than the first page of a thread.
Instead of adding more suppositions to this, and since Sweet Shooter apparently isn't going to clarify what he said, let's just close it since there is no solution for the question asked with the current state of the vBulletin software.