look at www.schluter.com
for Kerdi (you need their membrane and drain, too), or www.wedi.de
for Fundo. One or both should be available in Canada. For the Schluter products, check with the people in the TYW Store on the blue bar above.
Not a pro, multiple Schluter Workshops (Schluterville and 2013 and 2014 at Schluter Headquarters), Mapei Training 2014, Laticrete Workshop 2014, Custom Building Products Workshop 2015, and Longtime Forum Participant.