I've bought something very similar at the chinese herbs/grocery store in China town on the Main Street, first block. I found it in the refrigerator section.
Also saw what looks like an Indian market store on Azuenega near Santa Fe (Recoleta side of Azuenega ). But I've never been inside it.
Actually puri and nan are not difficult to make. I've done it so I can speak from experience. Just make a batch, let them cool, and pop them in the freezer in ziplock bags to be used whenever! The recipe would be easily found on the Internet. Uhmmmmmmm.