50+ Manila Clams 0 Communicator Parts…

Had guliver wash up on my island a day or 2 ago, he told me about digging up his communication parts, so I started digging for them. Fast forward to now, I have over 50 clams but haven’t found a single part. Am I doing something wrong, I’ve mainly been digging around the beach he washed up at, but I’ve also went around digging EVERYWHERE on my island, still nothing :(