Oh for the peices of junk I've bought and begged the insurance companies to insure. What you really need is plan to fix your house and more money. Upgrading systems in your house is never a bad thing and more money for the higher risk it represents to the insurance companies.
Get some quotations to fix the areas the insurance companies have deemed a problem. Then you need a plan on how you think it will go togeather. Bundle it all up and talk to a realitor or insurance adgency and look for a company that deals in higher risk homes. Some states have insurance pools for this.
You may get cancelled now and again, but your object is to bring the house up to a standard where you will get reduced rates.
Once you get there, (It always takes me about a year) re shop your rates and you will find that more companies will insure you at reduced rates.