For the Panel Due 7" I have designed a cockpit which integrates DuetWifi also. It is supposed to be used with 60x20mm I5 extrusions but you might cut the STL to your needs or use the Onshape CAD files for variations. For example you might surpress the "NXD evo" or change it to your super dooper printer name.
click pic for CAD
Have fun with it