parking brake retaining clips?

Looking for those flat U-shaped clips that hold the parking brake cable housing in place on the chassis. The slot is about 3/8" wide. Anyone got a part no. or an online source for these? The only thing i was able to turn up was on Amazon pricing them at $5 apiece. I have a hard time believing something that seems to be a common item on brake systems is so hard to find. Unless I don't know what to call it. Thanks in advance. =)