If you mean the carbon fibre bumper vents these are made by a company called creative carbon and obtainable via a guy called Shins on the RSOC

If you are after a carbon fibre roof it has not been done before as i have already looked into it for mine - if you want to do it you would need to get a qualified company to make one from scratch, including moulds, etc - you may when you find out how much it will all cost