Pistachio Butter in NYC
if any of the Whole Foods locations have the machines to grind your own nut butter, that's your best bet. i'd call the stores & ask. otherwise try Fairway.
if you can't find it anywhere you can order it online. if you need it quickly, just buy some shelled pistachios and grind your own in your FP or a spice grinder...or buy the pistachio flour at Kalustyan's and add water to it.