i dont know if it will be easier in nyc. whole foods is supposed to have them. i preordered mine probably about two or three months ago. good luck with your search!
i dont know how it works at Holt's but here in NY there was a two bag limit per person (to prevent bulk purchasing) and they had to be pre-ordered... they will be available in the store later on this summer I've heard.
JMTC