Shouldn't these be close enough: McMaster-Carr? There's for slightly smaller screws, and the length is 1/8" (3.175mm) rather than 3mm, but I think they should work.
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Shouldn't these be close enough: McMaster-Carr? There's for slightly smaller screws, and the length is 1/8" (3.175mm) rather than 3mm, but I think they should work.