Well i guess I saw this thread a little to late. -- i got a bottle of touch up paint from the dealership for my SSB and it's true that it's definitely a darker gray shade. I wiped it off immediately!
The bottle part # is 05127585AA and it's supposed to match the SSB but don't waste your time it does not match, not even close.
i have a couple of chips in the rear bumper. I'll try some local body shops to see if they can match it.