After getting some positive feedback on Pilkington from the Team Camaro forum, I ordered the glass directly from Pilkington Classics. I spoke to them on the phone and asked many questions before placing the order. I was told their windshields were made in Mexico and that all the other glass was made in the USA.
I also asked that if you ordered the correct date coding and "LOF" logo (which I did), would there be any other markings on the glass. I was told that would be no other markings. We'll see what is on them when I receive them and I'll report back .