I found mine at Woolworths, but not with all the other Teas/Coffees.. It was in the health food section. "Red Seal" brand for less that $5 - they are the bags, not loose leaf. I do have the loose leaf stuff as well, got it from a Health Food store.. works out cheaper than the bags, but not as convenient.
I hate the taste when it is hot, so I drink it luke warm/cold.. but still only manage one cup a day, so might suppliment with tablets or try mixing another herbal tea with it liek peppermint.