Hello People.
I can’t help you with the silicone case but here is a simple bonnet made of aluminum foil. It could be painted black and fastened with clear tape.
I wanted black cameras so I painted my own.
Here is a link to printing up photo paper masks that you can cut out and use, Place the glossy side against the camera’s face and weight it down with some coins for best results. Several light passes with the spray paint will provide a nice looking coat.
Paint Mask for Easy Black or any other color V3
The next two links show 2D and 3D masks being used and the results of their use.
3D Paint Masks for Easy Black or any other color V3
3D Paint Masks for Easy Black or any other color - 2
Here are some pictures of a black V3 with a bonnet:
Victor Maletic.