I bought the cheaper version at wallyworld, size C (19-21'), about $50-60, since I wasn't too sure it would fit. Turns out it fit my Seafari pretty well, even with the bow rail. I ran the bow line up to rail and back to light fixture on top of windshield and put a pole under it to support front section.
Supported rear section with deck brush in center rod holder.
I would think my windshield is about same height as windshield on a CC, although further forward, so this cover should also work on a CC.