There's 3 main cases included in the downloadable .max file, and a small metal suitcase style one too. The decals/stickers are easily editable (just save out a new texture with a seperate mask) or completely removable.
Other shapes and sizes and colours can be created easily from them should they be required.
All the renders above are done using vray - all the textures you see are included and set up for vray and are ready to render.
The main body texture of the cases is just a standard max procedural map (cellular) that will be easy to set up and use in the standard max scanline renderer too.