You wont find the glass for the cars head light! it is absolutely pointless to even search! Only glass was available a couple of years ago but now you can buy a complete new TYC Head Lamp Complete with Housing and Glass and the Rubber Boot. Places to Find are:
M. Arif - Keystone Auto Body Parts, Plaza. Chaat Wali Gali Ph # 0300-2265005 or 021-32726967
or
Allies Autos Main Plaza Market
Last Time I checked TYC was B/w 3500-4500 per head lamp
Stanley is not available new these days but can be found at Shershah easily with Saeed Bhai.