frank,
I've been working with Senior Savings Network www.seniorsavingsnetwork.org for several years and have been very pleased. They helped me immensely with choosing Medigap and Part D insurers. Each year they contact me to discuss new pricing and possible changes of insurers or Medigap plans.
They work nationwide.
Might be worth getting quotes from several brokers to compare how well they work for you.
omni
