Resources below link to field hockey federations around the world. please let me know if I have missed any.
Useful Links:
Official website of hockey Australia: http://www.hockey.org.au/
Official website of the Great Britain team: www.greatbritainhockey.co.uk
Official website of the New Zealand hockey team: http://hockeynz.co.nz/
Team USA field hockey website: https://www.teamusa.org/USA-Field-Hockey
Official website of team India: https://www.hockeyindia.org/
Official website of the Pakistan team: https://pakhockey.org/
Asian Hockey Federation: http://www.asiahockey.org/
Malaysia hockey federation: https://mhc.org.my
Official website: Canada field hockey http://www.fieldhockey.ca/
German team news: http://www.fih.ch/inside-fih/our-members/germanyhf/
Belgium team news: https://www.hockey.be/fr/
Essential Supplies For Your Hockey Club:
If you are thinking about setting up a hockey club I found these goal posts which meet international standards on Amazon. Let me know if you know of a cheaper goal.