What do you mean by original files?, these are from 3D scans so they are nothing but meshes.
If you're looking for CAD files you're going to have to design them yourself.
I assume when printing you turn supports on correct? Or are they not needed? Also, when opening the file the controller plate is upside down on the print bed. Your pictures show it rightside up. Do you flip it rightside up, or print it upside down?