Costco always had Mexican Cokes in stock, and as of a few months ago, the Giant off Rt7/66 in Falls Church started carrying Mexican Cokes, Sprite and Fanta in bottles. Some of the International Marts would have the same selection, it was always a crapshoot finding them though.
I was in Fresh Market tonight and they had Cheerwine, Mexican Pepsi, Fanta, Sprite, Dad's Rootbeer, Blenheim Ginger Ale and a few others in 12oz bottles, prices ranged from $1.39-$1.99 though.
Sounds about like what I find. Oh yeah, Wegman's has Cheerwine for about $20 a case.