[Ron Ramirez]

Where the cloth is dark is where it was not exposed to UV light and, as a result, did not fade as did the part that was exposed.

The cloth that is/was behind the grille bars was partially protected by those bars, so did not fade as much.

You know you can no longer get the original diamond pattern. So, you have to settle for something like the cloth in the link you posted. Better that than to have ripped cloth...