windshield/back plastic identification help

[wondrwhy]

Can anyone tell me what these pieces would fit in. They are both the about same size measuring 19 1/4 top to bottom in the middle, and about 42 3/4 across. There is one glass and the other is plastic, I'm assuming it's for a convertible. The glass is marked with Sekurit D-02/AS2 and it has a Porsche Registry sticker on it. Doing research it seems it is bigger than most windshields for the 356. Thanks for any advice or information you can pass along.