Just saw the prettiest plastic plate at Target. now i have a reason to go back and get it! DIY Cake Stands from outdoor plates and cups. (Wouldn't suggest using a rounded/concave plate as it might sag the cake or pie.
DIY Cake Stand: You& need . A drawer pull. An allthread to match, so it will screw into the drawer pull. A bolt and washer. Paint, if you so choose. A drill and bit. A candlestick with a hole through the center.