Here is a link to the National Hamster Council Site which is the governing body in the UK
Home - National Hamster Council
You can read all about all aspects of hamsters here and also read the UK standards for all species colours and patterns and also the constitution for our clubs and the standards or care and breeding we strive for.
I would suggest you start off by trying to locate another small animal fancy such as rabbits or guinea pigs which already has a following in your country and try and arrange a PET hamster show tagged on to their next show. You need to start small and gradually gather interest and members.
Your closest country is likely the California Hamster Association.
Hope that helps.
(Pophammy is my daughter by the way and busy with exams just now!)