2 really good fins here:

Vector Weed fin in carbon 44cm / tuttle
Used / Few tiny chips on the trailing edge ( can be sanded easily )
$250

F-Hot Slalom Carbon 38cm / tuttle
Model RWS 3
Used a few times / very tiny small chips on trailing edge ( can be sanded easily )
Those fins are among the best handmade carbon fins in the world / unreal performance
$320 ( retail from the UK $500 )

http://www.f-hot.com/fins