Sorry about the break-in. I hope it doesn't happen to me anytime soon (*knock on wood*).

Most insurance companies have what the call an "additions" payment. Its an extra payment in addition to your standard liability/comprehensive/collision that covers anything "extra" that you put on the car. My insurance company (StateFarm) provides up to $1000 worth of coverage for extras free of charge. I think most insurance companies have some type of additions coverage. Good luck