Slightly off topic, but just to let you know in the US, an insurance company has to cover pre-exsisting conditions as long as you have had them covered by ANY insurnace company for the prior six months. It's the law.
On topic, if you are in a Kaiser Insurance area, their rates are pretty reasonable for individuals.
Be careful signing up for insurance, though. Check the company out thouroghly. From what I have read, individual insurance scams are on the rise. They take your money, tell you that you are covered and then when you need coverage, they turn tail and run.