A friend of mine was thinking of putting them on his wife's honda. He found some for sale at rockauto.com but that was a few years back. Even he said he wasn't sure if he would see a return on his investment though I think they were only $8 or so.
It is a good idea though I guess most people don't care enough for it to matter.
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--Mahatma Gandhi
Found several Raybestos ones on Amazon in the $6 to $12. Thing is there was no way to determine which clip would fit your car. Raybestos own site didn't even have the clips listed.
Came across a blurb in an article stating GM started incorporating a spring in the abutment clip for this purpose. Have to remember to check the Sonic for it when a rotate the wheels.