Sorry we do not supply rocker templates. There are no standard dimensions for a surfboard rocker (along the stringer) since it all depends on the waves you surf and how you want the board to perform.
Stock surfboard blanks have proven rockers that are a great starting point and maybe a little adjustment is needed while shaping to get the desired rocker you want to surf.
Extensive info on ROCKER can be found in our Surfboard Design Guide