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I would try any local parts store, usually they carry an assortment of body clips and they should be able to match them up for you. If that doesn't work out, the next thing to try would be to find a body shop in your area and see if they have any. I find it hard to believe that toyota can't order you those clips separately, so you might want to try a different dealership as well. Good luck, hope you get it sorted out!
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