Im obviously new to this forum, but had no idea where else to check for help. I'm trying to replace a metal fin that was on my mother's 1975 Taperflex Concave Competition water ski. I'm having quite a bit of trouble locating the replacement fin as it's measurements are not easy to find. The fin measures 4 1/2 inches from top screws to bottom screw and the width of the top two screws is appx 3/4 inch apart. If anyone has any suggestions on where I might go to find this replacement part please let me know.