Yamaha PSS-50 Battery Compartment Cover

I lost the battery cover for one of my kids' favorite music toys years ago.
After my (awesome) wife got me a Makerbot for Christmas, I decided a replacement cover would be my first stab at learning CAD and working with the 3D printer. So if anyone out there has an old Yamaha PSS-50 Portasound Electronic Keyboard, and the cover is lost or broken, let me save you the trouble of designing it yourself.