Not sure how to find old posts here but you may want to try the search tab at the top and type in coin insurances, insuring coins, etc. Might find many posts in the past about them.
My suggestion is to be really carefull with insuring anything today. In the old days your insurance agent was a close friend, relative or neighbor. So almost anything you told them was really confidential. Today you have no idea who gets this information and most of it goes into a computer and possibly hundreds or even thousands of people have access to this information. And usually many of them are not permanent employees but someone just filling in a job since out of work. Some may not be exactly the most honest people either.
Insuring a coin collection, guns, knives, swords, stamps, etc by detailing everything you have could end up in the wrong hands and the results may not be nice.
With the economy the way it is, so many people out of work, more crime than ever before, this is not the best time to advertise your possesions. Like telling the post office, police, your neighbors, relatives, paper delivery service and placing a note on your door saying gone on vacation, no one home.