Not ccomplicated at all. These days you can indeed make international calls. Just get the non 1-800 number from the web... And remember the 5h time difference to NYC. So if you are home at 9pm its nice 3 pm here. And - the 5th avenue store is open 24/7 so you can even call when you are getting up, will be less busy.
Or you order online and have it fast shipped where ever you are staying.