What you are describing is fairly easy to get, at least in Europe, e.g. from https://www.whittard.com/tea/tea-type/green-tea/dragon-well-...

They also have some of GPs favorite: https://www.whittard.com/all/ceylon-orange-pekoe-loose-tea-p...

I prefer tea from Hangzhou as well vs Sri Lankan tea. I get it currently shipped via HK as it is very hard to find good tea otherwise.