I bought some carbon fiber mirror caps from a forum member which he apparently got from eBay. I think they look pretty good. None of the bubbling issues that supposedly plague the caps from some manufacturers. I immediately sealed these with some Menzerna PowerLock and followed that with some P21S carnuba wax. It'll be waxed monthly. Maybe sealed every other time. I really like the look of the CF though and I look forward to adding a CF spoiler in the future.
As far as installation goes; a lot of people will tell you to just yank off the old mirror caps. Well, the caps I bought have broken tabs and I suspect that it's due to the seller yanking them off. I figured there had to be a better way and did a quick search. Luckily I found and followed the method I detail in the
How to install mirror caps thread.