I bought a 49 Chrysler rear windwo off of ebay. Not an exact fit for my plymouth so I am looking at selling it. Its in great shape for being dang near 60 years old. No cracks or chips.
http://i12.ebayimg.com/01/i/06/96/bc/f0_1.JPG
http://i20.ebayimg.com/02/i/06/8f/44/83_1.JPG