After Market Parts Insurance

As most of you know, toys for your Toyota add up quickly. I have racked up around 8K of extra parts and modifications to my truck and I haven't done much.
In my home province we have government insurance.
They don't seem to have a firm system on this. It's a show the receipt and beg situation.
Some recent cat thefts in my hood have got me thinking what if these crack heads decide my shiny new TRD exhaust might fetch a rock as well as the cats.
Has anybody had any experience with this?

 

I am the US so it probably works different than Canada and even differs between insurance companies. I gave a copy of all my receipts to my insurance agents and he added the stuff to my truck so it's all covered. Of course my insurance went up but it's covered for a loss if anything happens.