Neiman marcus in tysons corner (galleria II) carries them, but I don't know what they have in stock. I've also heard that intermix in Georgetown carries balenciaga, but have never been there.
Yup, NM is the only store around here that carries them. Their stock varies so you just have to go and look or call. Last time I was there they had a lot of emerald bags and 1 day bag with a blue floral print.