North American umbrella organisation:

Gaden for the West
web site: www.gadenforthewest.org

Canada:

Chittamani Mahayana Meditation Centre
Ottawa, Ontario
web site: http://www.dharma.ca/


Potala Buddhist Meditation Center
Thunder Bay, Ontario
web site: http://www.potala.ca/

Tashi Choling
Nelson, British Columbia
web site: http://tcs.kics.bc.ca/

Zuru Ling
Vancouver, British Columbia
web site: http://www.zuruling.org/

U.S.A:

Golden Blue Lotus Meditation Center
Moscow, Idaho
web site: http://community.palouse.net/lotus/
This site includes a biography of Zasep Tulku Rinpoche, and the Long Life Prayer.

TsongKhapa Center
Kalamazoo, Michigan
web site: http://vajra.us

Vajrayogini Center
Seattle
web site: www.vajrayoginicenter.org

Europe:

Mudra
Bristol, UK?
Web site: www.mudra.co.uk

Germany
(in German!)
http://hometown.aol.com/gadenmahamudra/myhomepage/index.html