Replacent for Lost Nikah Namma

How to get Nikah Namma replacement for lost Marriage certificate? I got married in Karachi, Pakistan and left my Nikah Namma in safe keeping at my parents house but recently it was stolen with other valuable things. They actually took whole safe with them and my Nikah Namma was in there. The Mullah who officiated our Nikah has died 10 years ago and the person who took after him know nothing about previous records.

I’m wondering - is it possible to get some kind of document from Pakistan and more importantly (from which department) to prove my marriage to my husband. I’ve been married for 15+ years and my ID card and Passports are all under my husband’s name.