exhaust shield ??

Hello all, I have a 1990 Lumina 2.5L 4 CY with about 125K on it. I was replacing the o2 sensor this evening, and noticed that the fiberglass heat shied that protects the coolant recovery tank is pretty much torn to pieces.

Looking to see if anyone has found or created some sort of replacement for this piece..

Thanks
http://i123.photobucket.com/albums/o294/Nodaknova/DSC00554.jpg

http://i123.photobucket.com/albums/o294/Nodaknova/DSC00555.jpg