vegan2,
We buy our windshields and frames as an assembly from England. I am not sure, but I think the windshields may be made in a third country. Every part is supposed to be interchangeable with an original car's but we haven't experimented. I can't vouch for other windshield suppliers - we've always used the same people.
I have absolutely no idea how the reference to Porsche came about. I have never seen a Porsche windshield that came close to the correct shape. We restored Porsches before we started making kits - that's about as close as it gets.
Peter Portante is simply a voice on the phone. He doesn't exist in corporeal form.

You can tell that is true because his ethereal form can't push the keys on the computer keyboard. They just pass right through.
Although is does sometimes host customers in his house.