I am sorry to hear that & I can relate to your loss as I had a home fire back in 2001 & lost everything to smoke & water damage.
Now that I have a sizeable firearms & edged weapons collection I need to make sure I get insurance on it as well as take measures to protect & preserve it. I am thinking of having custom plexiglass cases designed & built that will be airtight, waterproof, fireproof, climate controlled, etc..
I am reserving a whole room in the house & designing it similar to museum quality to house my weapons collection.
I know what you mean about things that can not be replaced..
I'd be fucking ripshit going apeshit right now if I were in your shoes..