As a quick point of clarification, Roku Streaming Players and Roku TVs use different IR remote codes for IR functionality. You'll need to use a Roku TV remote.
Your TV manufacturer can assist with a replacement if you need one. https://www.roku.com/products/accessories/roku-tv
My apologies—an oversight on my part.
No, we do not currently offer an Accessories store in Canada. You'll want to contact your TV manufacturer in that case.