Helmet skin request

[DavideBorghi]

Hi Guys,

I'm going to race a championship with 27 racing plate and I'd like to have an helmet half Gilles Villeneuve and half Casey Stoner with vertical split.
I can do really simple grafics, but I don't have idea how to do this, can someone do this for me or at least a guide to make helmet replica like this?

Thanks to everybody