Where are you located? And I presume your B13 did not come from the factory with an SR20DE engine? If it did, then you should be able to get the parts from any auto parts store or from Rock Auto, or from GregV here on the forum if you want OEM parts. If you converted your car from drums to discs and you used the hardware from an sr20de car, the same thing applies. If you are from outside the US or used a different brake kit to upgrade your car from drums to rotors, we'll need more info to be able to help you out.