Hello Erik,
the window ( repro ) that Siggy does not want to use his his only chance.
There were 11 windshield made from a guy name Koch from the area by Bonn. He has also a Lawrence and his windshield was broken. We als got 2 of them. They do not fitvery well ( some are 2 cm bigger ) at the sides. When you restaure you car you must change the frame to the glass. We also looked for a lomg time for a spare glass. On our cabriolet we also hat to fit the glass to the frame. Rometsch had a company that extra made the front windshields for the Lawrence for them. So if Siggy does not want to use a coppy is has 3 options , drive with no windscreen, use the coppy or by a second Lawrence and use that windsreen.
Bye Christian