Surely it would have hit the beach between you and Oliver's Hill on yesterday's northerly if no one has pinched it you'll find it. I saw I kite at Frankston yesterday and wondered why it landed even though the wind was good, guess that was you.
lost my board at keast park a few years back in a northerly, ended up at frankston peir and was picked up by a beach walker. Im assuming your phone number was on the board!