Porterfield makes a street performance pad for the 308, not too expensive either. Kevlar composition I think. They are available through many ferrari parts guys like nicks forza, ferrari parts etc. But they are located in costa mesa california and you can buy them direct. I'll see if I can find a link or ph# and get back to you. They also can provide new cross drilled rotors (stock size) that will help performance and fit within stock wheels, also affordable.
-Lou