Thanks. What are the premiums like?
If you go out to medicare.gov, you can get a list of the medigap plans available for your state:
http://www.medicare.gov/default.aspx
http://www.medicare.gov/find-a-plan/questions/medigap-home.aspx
http://www.medicare.gov/navigation/medicare-basics/coverage-choices.aspx
Prices vary from company to company; (AARP seems to be the most expensive).
http://www.medicare.gov/find-a-plan/staticpages/learn/more-about-medigap-basic-benefits.aspx