CF wings
Who makes them and what do they cost? pros/cons on each?
We don't presently make one, but could develop such.
You may already know basic aerodynamic principles, but I'll throw this out anyway;
In stock configuration, the aero balance of the car is really good. If you add downforce at the rear, you will want to add downforce at the front (which means a longer front splitter).
Also - what is the end game? Top speed or lap times.
Adding downforce increases drag that will limit top speed. Downforce serves to increase cornering speed, so it reduces lap times.
Is the wing adjustable? Pitch will affect downforce and drag.
Do consider the structual integrity of whatever you go with; both the wing structure and the mounting.
You don't want to end up like Mario Andretti when his tail collapsed cornering at Indy.
That was a pretty clear lesson on the contribution of downforce!