If your missing, broke, the anti-rattle spring that clips on the inside pad, and goes into the piston, ( my GW parts guy calls it a cricket), you can pick them up from Raybestos Part no. H5404. They come 4 to a box, 89 cents each.
Your parts guy was wrong, the cricket is the little metal piece that is riveted to the pad to make a chirping sound when the pads get worn thin to prevent you from chewing up a rotor.
The part you are referring to is a anti-rattle clip and it simply holds the shoe tight on the piston. The "cricket" that is riveted to the shoe chirps like a cricket when the pads are worn low and need to be replaced.
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