Yes, it is a very important document. I have no idea if you can get a duplicate copy, but I guess not.
YOU did not file it safely, and now YOU have lost it, but it is YOUR important document, and now you are expecting me to find it. No, find it yourself! I am not going to look through ten heaps of paper each of which are about fifteen inches tall. The only reason they are fifteen inches tall, is because any taller than that and they fall over in even more of a muddled heap.
Then perhaps you will see that taking time to be organised saves hours if not days of looking for things.