Wheels come to mind. Thinking some forged wheels will come out much lighter over the stocks. Admittedly, I don't know what the stocks weigh but I doubt that weight savings was a factor there from the factory. Could be wrong. This will also have the added benefit of better handling d/t the lower unsprung weight.
I think your idea of CF body parts will definitely take away weight but that can get co$tly.
I think your idea of CF body parts will definitely take away weight but that can get co$tly.