Hi, I am just having a number of modifications done to my mint 2011 Plus 4 which includes the removal of the front over riders and hardware which I will be selling on. Not sure if they are the same as fitted to your Roadster but someone would know.
John
2011 Plus 4 (Marty-Photos are in the gallery)
The overriders themselves are the same part # MBC0680. Couldn't find the handed angle brackets which clamp to cross tubes in the 2006-2014 parts manual but if your car has these it would seem very likely they would fit the Roadster and allow overriders to be attached.