I made this mistake. They are talking about the plastic curved part at the top of the panels. They make them from metal in their complete panel and just lose fabric you have to glue to your plastic part for the unfinished panels. The problem is, I bet your plastic part (under the glued fabric) is all broken.
They wouldn't sell me the metal part after I found this out so I had to repair my plastic parts with heat and fiberglass and resin.
The extra money is probably worth the headache and potential damage you may inflict on the new panel.