I have a large Vespa windscreen for sale. Got it when I got my new bike but took it off right away. Its great to keep you warm / wind off you for long rides or if its cold.
Same as this one - https://www.scooterwest.com/gt-gts-super-large-windshield-original-vespa-623880-gts16pa.html
Selling for $150 - pickup in Hollywood
Pics here -