I haven't found them (but haven't looked too hard) for those anchors that screw into the ground like for a dog lease or something like that. If one is put in the ground right under the dolphin striker then tied to that I think it would work well. I don't think the forces on the dolphin striker would be too intense given the angles to make it so that the anchor would have to be really dug in. If no anchor is available I try to put the boat near trees so I can try to tie the trap lines to the trees with small sections of line.
My (your old) HT took a tumble on the beach here early on when I didn't tie it down and it broke a diamond wire (one of the reasons why I am still impressed with the Riba mast on that boat- it didn't break the mast, just the diamond wire). The guy that owns the land I keep my boat on had his HT up on saw horses to trim the rudders and forgot about it. Squall came through (wouldn't take much) and it flipped his boat around and put a 1 ft hole in the transom which he repaired very nicely. It took him a little time to discover that the mast had also been cracked which was luckily a relatively easy fix.

Tim- I hope you can get your boat fixed up soon. If I weren't 9 hours away I would offer to help fix it. It sucks when stuff like that happens but I actually somewhat like trying to fix it. Given how new the boat is I would probably go professional though. One thing I am not in a hurry to learn is gelcoating.