Sadly its the only conservative publication in Canada - aside from Fraser Institute which is more of a research organization, and the moderately conservative National Post.
Fraser Institute is a think tank. But there are others like it. C.D. Howe is pro free-market. More staid and centrist, though. Atlantic Institute of Market Studies is very pro free-market but concentrates on the east coast. Royal Canadian Military Institute is pro-military. So is CDFAI, CISS, and a few others. There are a bunch, if you’re tied to the academic community. Institute of Canadian Values is new (relatively...1 or 2 years old), but it is a think tank that is pro social conservatism. It’s director is a big figure in Canadian Christianity and its deputy influential amongst Canadian Jews (Ben-Ami). Canadian Coalition for Democracies is a pro-democracy lobby group. There are tons more if you know where to look.
The Sun and Free Press series of newspapers often have a conservative populist slant. One of the Montreal newspapers is conservative. I forget which. I am sure there are other conservative publications in Canada if you look.