This is Turkish Tea. You can buy from
https://www.amazon.co.uk/Caykur-250g-Turkish-Tea/dp/B003D0YN9I
https://www.amazon.com/Special-Turkish-Tea-Filiz-500g/dp/B002MN424S
https://www.amazon.com/Caykur-Black-Altinbas-17-6-Ounce/dp/B000RJARJS
Or you can search on Google 'buy turkish tea'