in nsw we had a place called Michele's Patissiere and they did a yum yum yum YUUUMMMMEEEE chai latte. I don't like the syrup ones but they used a powder. I'm so sad cos we moved to the NT and there ain't no Michele's here

but other than that I'd highly recommend making your own. It's soooo much nicer than anything you can buy, apart from michele's one, of course lol.