Puritans Pride, online, they have a few different ones ones called sleep enhance or something like that contains another sleep enhancer along with 10 MG melatonin, that one gets through customs in NZ, they have pure melatonin up to 20mg, you can mix an order with other supplements but your only allowed a certain value per order into Los, not expensive so try your luck, NZ only available on prescription, 2mg tabs, useless, they banned it a few years ago for no reason, I used to give it to my 80 year old mom, 10mg and she slept like a log, it also has many other health benefits, I have used it for years and it really does help with sleep.