They can be present right up the top of the shock piston, well up in the rubber bellows.
Jack the car up yourself so that the gap between wheel arch and top of the wheel is accessible and give the rubber bellows a squeeze or pull them up and feel around. If there’s nothing there all you will feel is the conical bump stop rather than the pucks which are a plastic disc about an inch thick, they will slide up and down the shock piston, so you can slide them out and discard.