Have you found one yet? If you do, you may consider strengthening up the rudder post for a little extra insurance. Not sure about the new ones, but the really old ones are hollow. Otherwise the boat is a tank. When I couldn't get over 2-3 kts I may have been expecting unreasonable things of the boat considering the sea state.
Edit: may have video somewhere... The first time I had trouble was due to my inexperience and putting a reef in too early. The second time the wind was 15 and the swells were 6-7 feet with a 6 second period. The other many times I took the boat in the ocean it did just fine.