A lot of time, I'll find the item on Napa, then take Napa's part number, run it at advance or autozone and even rock auto and magically the part they didn't have listed on their respective sites, sometimes comes up. Sometimes it's cheaper, sometimes it's not. Take the front rotors on my Gerst kit for example, I wanted a couple spare sets, I knew the OEM number, only Napa listed them, take Napa's number, searched it at advance, saved 30 bucks per side...wierd huh?