20-CG5-01
KanomNom
I don't know if 240sx brakes will work, but since some people do run 350z spotted rotors. Try giving K sport a call.
http://www.nissanclub.com/forums/nopi/326186-ksport-big-brake-kits-your-nissan.html
http://www.nissanclub.com/forums/nopi/326186-ksport-big-brake-kits-your-nissan.html