You do not have to have an EIN to claim self-employed health insurance premiums as a cost of doing business. They do not get refunded; you just have a deduction so that you don't pay taxes on what you paid for health insurance, up to some limit, depending on your SE income for the year.
As for "where" we get our health insurance, that will vary by state, because states license health insurance companies and have different requirements, so different companies and differennt coverages are offered in each state. What state to you live in?
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.