Have you swapped out the chrome fog-light trim pieces on your Denali?

[KMeloney]

I'm keeping my chrome-on-black theme on my Denali, but am considering replacing the chrome fog-light trim pieces with black ones. If you've installed black pieces, did you go with OEM ones, or aftermarket? And how easy is it to swap these piece out? (What's entailed?)

To be clear, I'm talking about the J-shaped pieces that go under the fogs, and not the "vented" pieces that the fogs sit into.

Thanks!