I am wondering what within immigration you are interested in... Contrary to what you've said, I think that there are quite a few scholars at UofT who work on immigration. To begin, there is a graduate program on "Ethnic, Immigration, and Pluralism Studies." Scholars in the sociology department that work on immigration include Eric Fong, Jack Veugelers, and Jeffrey Reitz, and they all work on quite different things within the study of immigration. There is also a full day conference today that addresses some issues in immigration under the wider topic of the effects of migration on Canada, for instance. Thus, should you consider a Masters program as suggested above, you might not want to write off UofT. Anyways - don't give up yet! It's not even the end of Feb!