There is no "intellectual property" involved in foils.
Check out the NACA foils or go to http://www.mh-aerotools.de/airfoils/
After you make a choice make a test section and make sure
it fits in your CB trunks. Then make your molds.
Then check out http://www.philsfoils.com/ , they can make foils, plugs, or molds for you.
Good Luck,