You can get baby clothes for 0-24 months at either the Tommy Hilfiger (Richmond) or Tommy Hilfiger (Metrotown), where they carry the Children's section.

It's called the "layette" collection, just for newborns =)
I'm not so sure about the Richmond store, but a lot of the sizes/styles are sold out (the smallest at the moment is 3-6 months) at the Metrotown store, but more stock should be coming in!