out line and rocker looks great.
carbon over eps maybe on the bottom with a layer of glass over it, on top I would do at least 1/8 layer of something first. just to help out with heal dents and such... ( production board use wood inlay or cork most the time)
Tuttle you can make if you have some skills, but you will have to inlay it into corecell or dinvy
for support around the box...
I just did a foil board for a customer that supplied a Ketos Box which is carbon. I inlayed it into corecell with carbon ( made the block the same thickness of the board 60mm thick) he also wanted a plate mount system so he could ride both of his foils.
anything can be made if you take your time