I've still got this sail. Perhaps the following might help identify the owner:

Their vehicle was a white, 4 door pickup, with a chrome roll bar just behind the cab. The board was attached to the roll bar, but its nose was sticking up in the air. The sailor was a guy and his assistant was a girl. I think they told me that they were experienced yacht sailors. I think they told me that they lived in or around Elwood.

If any windsurfer can identify these people could you please send me a PM with their phone number. I would really like to return the sail.,