I am also a member of the "IsuzuWeb" (my other car is an Isuzu).
http://www.isuzuweb.org/
Club members receive a quarterly magazine but the are no membership dues at present, however this is likely to change in the future due to increasing printing costs.
It must also be noted that the club has been threatened with legal action by Isuzu Motors of America.
http://www.isuzuperformance.com/isupage/isuzu2.html
paddlesnz
Gunma
Japan