I bought some from the Waldbaum's Tomkins Ave store last year. But be warned: there has been some kind of blight or disease in the tropics that has devestated the vanilla orchid so the beans are scarce and expensive. I had to find a manager to procure them and paid, I believe $18.00 for two.
I think you are not likely to find them sitting on any shelf of spices in any store. Good luck.