Actually I started seeing ad's for those about 3-4 years ago and they had them at the SHOT show before they started retailing them. If I remember right you can buy them at C***las the last time I was in our local show, they had a display in the front of the store as you walked in.
This makes me wish I lived near saltwater. Lol. No saltwater in MN except at the zoo and in some pools. Doubt they would take kindly to a boat with that name floating in their water.