The only thing I have found is tinted tail light film thats pre cut and available in smoke and dark smoke. Give it some time, if they stick with this body style a few more years there should be parts on the market. If GM closes shop 3rd party accessories and replacement parts for a car that only had a 2 year run wont be very prevalent.
I want some vent visors that mount in the channel with no tape so it doesnt cover up the chrome. I have seen some listed here and there but cant find an actual picture of them on the car or a decent review.