Hi Team, I'm looking for a rudder replacement to fit my old Burton Wedge spec surfski.
The existing rudder has a 180mm long shaft length and 210 long x 140 wide rudder plate, the whole unit is approx 390mm long.  

The diameter of the shaft is 8mm and the thread is squared off at the top for attaching to the steering plate. 

Was wondering if any of the rudders you sell would match, especially the shaft length and diameter?