Hi Birdie,
As you can see from your own research, 12 step groups for anxiety do exist. They range from general emotional health, to panic and more specifically some groups choose to focus on social anxiety.
Another avenue to try for additional support, is peer mentoring. Peer mentoring is like a sponsor in AA. An individual who has rehabilitated from panic disorder will help guide & support you through your journey.
The best places to find these types of support groups are to contact your local mental health unit. They will be better able to inform you of what services are located in your area.
To help you locate mental health professionals in your area, The National Institute of Mental Health (NIMH) has a Referral List available, which gives the names and telephone numbers of organizations that can provide you with a referral. If you live in the United States call 1-800-64-PANIC. You can also try the Anxiety Disorders Association of America: http://www.adaa.org/
Hope this helps!
Danielle, Bilingual Health Educator