Do you get the pads as well, TRW pads $58 with new clips :)
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I found the same issue last night looking for these clips, surely that isn't the cost for clips only???
Is there something inside the tyre? TPMS sensor broken off and rattling around? Swap tyres left to right to check. I doubt it but it seems you've done everything else.
Most sets of pads always come with shims, clips and caliper slide bolts. A dap of caliper grease on the slides after liberal cleaning with brake cleaner, and ensuring the clips are installed correctly should eliminate and chatter. Don't forget the anti squeal shims if required.
who was the supplier? That's much cheaper than i could find