First off, massively sorry to hear about this mate, must've been absolutely awful Just glad you're okay, that's so much more important than a car even if it doesn't seem so right now.
This is why I bang on to people about insuring what you want insured, not just the bare minimum. Nic did it correctly and had his mods insured, even if they weren't insured for their full value. Most people just have coverage that lets them have mods on their car, which means you could put £10K worth of wheels, bodykits etc and get precisely zero back.
Sorry to hear you didn't get as much back for the mods as you wanted mate, but I don't think you did too bad out of that having heard a few horror stories. No comfort, I know, but hopefully it'll still give you a base to move onto the next project with.