Need new lug caps

I put on new Z06 wheels the other day and i already lost two of the little gunmetal caps that go over the lugs :eek: . they are missing off of the locking lugs, maybe there is something to it. anyway, where can i get a new set for fairly cheap?

just replace the whole set of lugs with closed end chrome ones

Well the wheels are gunmetal, that might look slightly gay. I dont know. Where do i get replacements.