Actually it says towards the bottom of that page that their jackets are made by Aero Leather in Scotland. They make a very nice jacket.
I'm not an A-2 expert but I do have a Goodwear Rough Wear that I had made up when John Chapman first started Goodwear Leather. John's knowledge of A-2's is extensive. The leather is amazing and the craftsmanship is spot on. Unfortunately they are a small operation. I believe they have only one person sewing the jackets and unfortunately they are no longer taking new orders. Sometimes Goodwear has jackets for sale that customers returned or that are models.