i pretty much bet that they dont sell them anymore. you might have to get them through the manufacturer or somewhere else that sells them.
here is there site:
!S&S Headers manufacturer of street rod, roadster, four cylinder, Japanese, VW, dirt track, mini-sprint, modified midget, dwarf-car, sprint, midget, off-road buggy, Chevrolet headers, Ford, Accura, Honda, Isuzu, Mazda, Miata, Nissan, Rabbit, Scirocco