PLA Surfboard Fin 3D Model

I’d like a clean, watertight 3D model for a medium-size surfboard fin that I can print in PLA on my FDM machine. The finished piece should stand somewhere between five and seven inches tall and be shaped... (Budget: $30 - $250 AUD, Jobs: 3D Animation, 3D CAD, 3D Design, 3D File Scaling, Slicing & Print Preparation, 3D Modelling, 3D Print Design, 3D Rendering, 3ds Max)