Why not just get a graphic off the web, or from a stock photography house? I'm not sure if the Mapping Toolbox has any functions to draw the worlds countries. It would be nice if it did. If it did I suppose it could be contentious because some boundary lines are in dispute.
If you want the x,y coordinates, you could import an image that you got off the web, then use find() or threshold it and use bwboundaries() to get the coordinates.