Invader Cuddy V210 Help???

[DicksonV210]

Hey guys. I just picked up a 1986 Invader Cuddy V210 21ft. Its in great shape. It has the Volvo/Penta outdrive and 305 V8, it runs beautifuly. The hull is in excellent shape, it has a very nice tandem trailer. The only thing that needs replacing is the seats due to crakced material. Also the floor board on the standing portion of the boat is breaking down. Basically I want to replace the floor board of the boat. What kind of wood, and what thickness would I use? Also, does anyone know where I can get parts/accessories for this boat? I need the front railing for the bow of the boat. Any help would be much appreciated.