For all the collectors that are missing the gatefold cover for their Sharp GF-8 boombox – here is the solution. I uploaded an STL file to Thingiverse. It can be downloaded and either printed out with the own 3D printer or sent to a 3D print service company, that will do it.
https://www.thingiverse.com/thing:3408283
https://www.thingiverse.com/thing:3408283