When I bought my F/A new from the dealer (Canada), the windshield was optional equipment. (The speedometer was also an option) I ordered a windshield at the time but I think it took two or three months before I actually got it. Buddy at the dealer gave me a free case of oil since it took so long. I do remember having to buy a new replacement aftermarket windshield but that was a long time ago. I think I remember seeing one on e-bay within the last year or so. I'm sure there are some still out there. Good luck in your search.
Mark