BoxWave offers now metal Armor Cases for the Creative Zen Micro 4GB, 5GB and 6GB.

It is made of durable, protective aluminum, with a soft black foam interior to keep the Zen Micro safe.
A clear Plexiglas window protects the screen. The BoxWave Armor Case also gives you accessibility to all the necessary openings for access to the button functions, display and the headphone jack. Apparently the Creative Zen Micro 4GB, 5GB and 6GB versions are different as Boxwave offers a separate case for each model.

{ Source }

Solid protection for Zen Micro. But, personally I don’t like it! It made the player looks dump and heavy even thought its made with lighweight anodized aluminum.