Hi,
I'm just looking at getting started windsurfing and have a pretty old board that is missing the part that inserts into the board and connects to the universal joint. Does anyone know what this is called and where I can get one (or better yet can I buy one off YOU!- That's right this message is personalized :)

alternately any ideas of how to make one? how much force acts on this part?

I've attached a picture of what I'm talking about



thanks