Saving money on homeowner's insurance

I've learned, in the course of my shopping for homeowner's insurance, that the insurance companies don't like fuse boxes. This was finally made clear when the company I buy my auto insurance from refused to insure my house when they learned it had fuse boxes. A couple questions to another insurance company revealed a huge difference in premiums if I replaced the second floor fuse box with a circuit breaker. The difference was such that it would pay for the circuit breakers in two years.

This seems like it might be useful for others trying to lower their insurance premiums.

Homeowner's Insurance

My bank, like most, if not all banks, requires that I have homeowner's insurance. This requirement seems reasonable to me.

For the purposes of this discussion, the price we are paying for the house will be referred to as X. I looked around, and it seems that we've managed to get a good deal - to buy a comparable home (same build quality, size, and size of lot) - would cost 2X. This seems a reasonable amount to insure the house for.

However, while I was able to get quotes online for insurance at this level, when I called up one of the companies, they stated that they would only insure for full replacement cost, and that if something were to happen to the house, that they would rebuild it.

I have no interest in a new house. Zero. There's just no way that a new house would have the charm or character that this one does. What I would want is to buy another similar house. This insurer estimates that the cost of rebuilding would be 4X. Base upon what I know about construction, and given all the extra features that they didn't ask about (and I didn't mention), I suspect the cost of rebuilding would be closer to 6X.

I don't want to pay for insurance on a house costing 6X. I just want to be able to get another similar house in the neighborhood if something catastrophic should happen to mine. Why is this so difficult?