/the exact spot is somewhat exaggerated, perhaps but the article stated they were found together in a jumble and I’d say that qualifies as an exact spot in a sea the size of the Med.
It would be very surprising if this discovery doesn't lead to more finds, since it is now realized that these must be all over the place down there. The earlier perception kept anyone from thinking about that. The floor of the Mediterranean is probably littered with thousands of these from widely spaced time periods. See?