You can order the slotted rotors (why?) and ceramic pads from Tire Rack, but it'll cost more than $300. You can hardly do a regular brake job for $300. http://www.tirerack.com/brakes/resul...4&autoModClar=
You don't need slotted rotors unless you're racing it anyway. If it's just for street use spend the money on good ceramic pads though.
Don't forget the wear sensor on the front left and rear right calipers if your brake warning light is on.