@sardarg
Do not deal this way even if it is office asset. Of course, replacement cost of 8K+ will be burden on your pocket.
Cost effective solution is yes same; get them glass cleaning treatment i.e. buffing, polish treatment from Quality Autos, Water pump; it will definitely lessen your difficulties.
Submit this maintenance bill to your company that instead of replacement, you just performed glass maintenance.
Redo your headlights by cleansing treatment done by professionals at Tariq Road in A/c market behined Bashir A/c. They will make it just like factory bright in Rs. 2000- 2500
This bill will also come under maintenance category for your company.