You can get them from Whole Foods, but I'm pretty sure that you can only get them at their stores in New Jersey, Connecticut and New York in mid-July.
You can pre-order them by calling one of the AH boutiques; that's what I did and I'm looking forward to getting them:
Anya Hindmarch, 118 South Robertson Blvd, LA 310-271-9707
Anya Hindmarch, 115 Greene St, NY 212-343-8147
Anya Hindmarch, 29 East 60th St, NY, 212-750-3974
Anya Hindmarch, Short Hills Mall, New Jersey, 973-379-7183
I would hurry because you can only pre-order them until May 7th and the big launch date is June 20th. The UK version sold out in 2 hours and the lines were long!
Hope this helps!