Bicycle Workshop, All Saints Road stock Sapim. Not CX Rays though they'll special order them for you.
Old_Blue_Eddy. Most of the handbuilt wheels used in Paris Roubaix use CX Rays, they're lighter and stronger (failure tested to 3.5 million revolutions) than any other spoke I've come across.
Bicycle Workshop, All Saints Road stock Sapim. Not CX Rays though they'll special order them for you.
Old_Blue_Eddy. Most of the handbuilt wheels used in Paris Roubaix use CX Rays, they're lighter and stronger (failure tested to 3.5 million revolutions) than any other spoke I've come across.