I have never heard of a Passover meal that did not have lamb, and certainly all of the Jews I have known who celebrated Passover used lamb.....it is true that they don't raise their own lambs and slaughter them any more, they buy the lamb from the grocery store, which I guess would mean that it is technically not a 'real' Passover, but I've never heard of not having lamb at all.....lamb is more expensive than beef, pork, fish or poultry, but it is still widely available and not at all difficult to obtain....

To be precise, when I said 'the lamb' I didn't mean any lamb or a lamb shank, but the sacrificial Paschal Lamb.