Are there any existing PSD or Sketch (preferred option) files for Material-UI components available?
I can use Sketch build in Material Design Template v2 for mockups but I am not sure if that is an accurate representation of the components for prod design. And that is something that can cause issues later on.
http://www.sketchappsources.com/free-source/1601-material-design-sketch-template-v2.html