I had made the tiller and rudder to specifications some time ago. I obtained the stainless steel hardware from Edwin Tijsterman  when I was in Holland last.
 All fitted nicely except for the strips coming off the main shaft sitting too deeply into the rudderblade. I think it’s like that because the rudder is made completely out of fiberglass on the new boats. I made mine out of Tasmanian oak and filled in the depressions  with jarrah wood strips.DSC01628 DSC01805 The tiller and rudder installed on the boat:DSC01806 The coamings were left in water for a week and are now clamped to the bend and twist required they will be there for a while!!  A bit of ingenuity required to get the shape and the twist :o)!! DSC01802 DSC01801