You have to ask your SA for one at the store but first you have to have some type of history. They do not want to supply just bags.I am wondering how you get a wishlist appointment in Amsterdam. And what is better the shop in shop in the Bijenkorf or the normal store?
Regarding the best store it is up to you as a local to feel out the vibes and a find a nice SA. The SA is more important than the store.
Good luck