Sun Visor Replacement

Update-I called Vantage Plane Plastics and explained what I needed. I
scanned the broken visor and sent the image and dimensions to them and
they were able to identify the manufacturer (it isn't a Rosen product).
They called the manufacturer for me and were told that they were no
permitted to sell them as singles--had to sell as a pair. But they
said they could provide a blank piece of the same plastic, cut to the
size I need, and all I have to do is drill the holes. No charge.