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If you come across an Italian market you might stop in, all of the ones I've been to in Ottawa have had at least Prorasso, and sometimes Omega and various Italian colognes.

There are Shoppers Drug Marts everywhere it shouldn't take you to much out of your way.

I would also recommend grabbing a tube of Nivea shave cream while you are there, not mentioned much on here, but a really decent cream, and it's only around $3 a tube.

Shoppers Drugmart has the white and green tubs and tubes. https://www1.shoppersdrugmart.ca/en/search?query=shaving%20cream&srhtype=products