First of All Thanks for Almighty Allah that you are safe and give sadqa.
now come to windscreen, best place for windscreen is oposite of plaza their is very big windscreen shop (2 or 3 grades) and they all type of windscreen (I forget the name) I am sure you will find a good quality windscreen.
If you want to avoid people running after you at plaza than its better go their with some one and check and if you like it purchase the windscreen they can arrange the person for you who will come with you and install windscreen at your place. The person will charge around 500 Rs.
Their price are very good and dealing is also very fair, if i find the name of the shop i will update