I need to replace the centerboard and rudder and bronze skeg (lower rudder support/pivot. I have a template of the centerboard, but not sure what grade material to make it from, or what thickness. and advice if it is covered by FG, or what. Anybody able to advise me on this? Also need a template of the Rudder and suggestions on what to fabricate it from. By chance someone got any of these available for sale?