Whole Foods Union Square - just saw them there the other day, in the produce department near the mushrooms. Also available: emu eggs and ostrich eggs. Please get those and tell me how they are. I can't afford them, but I'm very curious.
Citarella does have them. As another posted mentioned, however, they are indeed much cheaper in Chinatown - I plan to make a trip down there to get some, as well as some duck eggs, to blow out for Easter.