After Sauber launched their new livery for next year I made this, it's not even close to accurate due to limitations in the UV mapping but it's the best I can do for now. I will try to make it more accurate and add at least a second version.
For installation directions read the README file!
You need the ERP archiver to install this mod!!!
Sauber C36-Ferrari Launch livery 1.0
The launch livery for the Sauber as well as I could make it