Download it in P.D.F. form here: Letter Size | A4. You will need a printer than can print a P.D.F. file, or a program like Adobe Acrobat Reader that can read a P.D.F. file. Print it on card stock (if you have none, paper will do) with a color printer, then follow the directions.
You can buy a beautiful hardwood version of the Foxagon Puzzle at Creative Crafthouse.