Sorry to hear about the lost Raybans. Don't give up hope though. This reminds me of a simliar story of my husband's Raybans. About 4 years ago, he went flying off his jetski in Paugus Bay and his Raybans ended up in the lake. He snorkeled that area all summer long. The following year he picked up where he left off and started snorkeling again. And would you believe one year later there on the bottom was the outline of sunglasses. Yup, they were his. Very dirty but still in excellent condition!
I myself lost my Raybans off of Weirs Beach, and they are probably still there!