Can anyone recommend a good place to get parts for a homebrew system (available to Canada, at a reasonable price).

Full disclosure, I’m actually looking to build a large 3D scanning system but in terms of movement of the camera heads, I’ve been looking at my printer and thinking that it could use a similar configuration though on a slightly larger scale (rails, with a wheeled+track system for horizontal and large spiraled cylinder for vertical) , but I have no idea where to source these sort of parts.

Any ideas?