There is no one source -- you really have to shop around.
I recommend calling other small businesses. You could ask members of your local chamber of commerce for advice. Most often, people are happy to help you.
If there is a local chapter of SCORE, they may be able to help you in many ways, including navigating the various local insurance vendors.
Question added to topic Human Resources • December 21, 2010
How can I find affordable health insurance for my employees?
I own a small business but I want to offer healthcare to my staff.
Penny is a seasoned human resources executive and consultant with over 25 years of diverse business experience in advising enterprise leaders on employment-related matters.