Linear drains are fantastic..but costly..The drains themselves can be $400 and you will have to grade the entire bath for this type of drain. www.noblecompany.com will give you more info on them. As far as finding them, they should be offered at any of the major tile vendors for Canada. Interceramic would be my first choice.

Guess I should have said Vancouver BC, Canada

A trench drain sloping from both side or one to the drain is just as effective and is less expensive

I would try buying them on Amazon. Please my website, which has links directly to Amazon for linear shower drains.