Nsg is Nippon safety glass also it's dealer is Amjad auto corporation fyi since Amjad who is the owner is the director of NSG Pakistan . This is old news snippet I found
"A $25 million safety glass project is being launched in Pakistan by Nippon Safety Glass (Japan) under a joint venture with Japanese and local companies. This was announced by Board of Investment (Bol), explaining that the project is based on most advanced technology from the Nippon Class Co., in a joint venture with Tomen Corporation (Pakistan), an extension in Malaysia, Malaysia Sheet Glass Co. and Amjad Auto Corporation (Pakistan).
The annual capacity of the project would be 525,000 sq. meters of sheet glass for the car manufacturers in Pakistan. The project will provide 200 job opportunities"
They do stock all kind of glasses though correct. As for fuyao not being an inaccurate fit well I can't say about that I just have my own opinion. If we are talking about a restored car we can't really jump to conclusions in your case. The pillars and body work can't do justice to judge about the glass and above is genuine windshield made by Nsg and other by tsg . Temperlite is tempered glass ,front laminated is dual layer with PVB. I can see many new cars coming with fuyao installed including jdms and Chinese. Searching more about the company it's more relevant to present cars and modern tech then old from Nippon. In fact saint gobain is also fuyao at the backend so that's that.
Rest assured , you must know about body works better as MashAllah it's a well done job front your end on that car.