CSR Racing 2 is recently out and their Camaro SS has the badges. It was mentioned before, that licensing was the issue with Forza 6, so if a small company like Natural Motion can get it then Turn 10 can as well. (unless there is some other reasoning?)
Links to shots I took in-game:
Front: Front-CamaroSS
Rear: Rear-CamaroSS
It’s not a licensing issue, it’s a decision of Chevrolet itself.
See the very last post from Mechberg:
‘Changes to the Super Sport models In Forza 6 were made in association with Chevrolet in order to align with the brand’s global naming strategies.’
http://forums.forza.net/turn10_postst40510p3_All-Chevy-Super-Sport-cars-censored.aspx