Canon's "matte" lens hoods.

[TexPhoto]

You can find 3rd party hoods on ebay that are much cheeper and near identical. Quality is not as high, but your original hood can stay home on a shelf and look good.

 

[JEAraman]

For my 24-105 hood, I actually took time to sand the exterior using sand paper, and spray painted it using matte black paint for some 10 layers. Looks better than original because it matches the camera body's matte style. Oh yeah! Gotta do this for all my hoods!

Interesting Idea.... you mind posting a pic of that?