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Your link does not work so I can not see what exact product from Manticore Arms you are asking about
In the link I can read "fits tavor sar" which is the original Tavor so it should be the correct one
However Manticore Arms does make rails specfically for the Gen 1 Tavors, not sure if any Canadian retailers stock or sell them. I imported most of my Manticore Arms stuff from the USA so either way they do make them and it is possible to get them in Canada
Manticore Arms SKU: MA-7200 should be what your looking for if you want a full length rail to fit a Tavor SAR
Manticore Arms SKU: MA-7300 if you want a medium length rail to fit a Tavor SAR