They make carbon fibre pieces to order.
I ordered a replacement for my busted front fender, but there was a mistake on the website and the price was incorrect. It was wrong by about £30 as well so not a small mistake.
The mistake only became apparent when the money was taken from my account and I realised it was much more then I was expecting to be taken. I rang them and they very quickly agreed that the price on the website would be the price that I paid and they would refund the difference.
http://worldofqbcarbon.com/store/index.php
For top class service, and what looks like a very nice fender, I praise World of QB Carbon.