Re:I know K & S makes air foil shaped aluminum but..
Not that I've ever seen anywhere, Dennis.
Wouldn't the simplest answer, however, since the K&S alum. tube is so light, be to epoxy inside the appropriate sized CF tube or even flat plate. This I have done.
Another effective route to achieve an aero profile would be to epoxy balsa around CF tube and sand it to an airfoil section.
It certainly would be possible to layup airfoil section hollow CF tubing yourself but I'm not sure that the gains would be worth the amount of work. It sure would be cool though.