If correct for the model year matters then date codes are something you need to also take into consideration.
I tried eurospare and found the windshield here : Ferrari 512 BBi Glass | Order Online Eurospares I can't find any other windows, any idea? It's for a BBI. Thanks
Should have gone to Ferrari UK (Maranello) they have them with the aerial in the screen. I know that for a fact as I had them made and sold them to them. As for side glass I think T Rutlands can help out. Do you not have any glass, why do you want to change ? Originality is key. Nick