How to create a mount for a PC mouse based on the 3D model of the mouse itself?

Hi,

i need to make a mount in which a PC mouse can be placed. 

Therefore i use a 3D model of the mouse.

Now i want to create a nice smooth mount which based on the shape of the mouse.

To create the mount a 3D printer will be used.

Since now i have never created a 3D part based on another given 3D part.

Are there any tutorials, examples or suggestions on how to do that?

Attached you see a quick and dirty first example, but not really adapted to the shape of the mouse.

Thanks a lot!

SolidworksModeling And Assemblies