Here are some useful links:

Amateur Athletic Union National Karate Program
www.aaukarate.org

Del Saito Martial Arts Training Center/Traditional Karate-do Federation International
www.tkfikarate.com

TKFI SHIHAN KAI Members

Shihan Ceci Cheung
www.aoinagi.org

Shihan Dwight Grover
ichibankarate.com

Hanko-Ryu Italy - Shihan Ivano Di Battista
www.hankoryu.org  (In Italian)