Hello Denys, I buy my Sencha tea(teabags and loose) at T2 and find these
very enjoyable.
Suggest you contact your T2 store at:

Garden City Shopping Centre, Shop 71,
125 Risley St
Booragoon 6154
Phone: 08 9315 1470

or check out their web site: wwwT2tea.com

Good luck, hope you find what you are looking for.