The Club website is here:
http://www.ceskoslovensky-vlcak.cz/
But it is only in Czech. Under "kontakty" you later may find phone numbers, but most of the people listed do not speak English.
Under "prihlaska" you can open pdf application to fill-in form for becoming a member of the Club, but again, it is only in Czech.
Try contacting Hanka Kaufmanova, send her PM to "Hanka".