I've designed a case inspired by the Commodore64 in onShape. It's tailored to the components that I had but the original model is available here and I'm including all the STEP files so you should be able to make the modifications you need. The case should work with any solder-in switch 65% PCB.
I've made a quick video with the build process if you are interested
And a quick write up on my blog with additional information.
I know it's not a print-and-forget kind of deal but I thought there's some value in it and wanted to share the model.
I've included a cut in half version for smaller printers but it's not tested, I've printed the all in one but you need a quite big printer (380mm wide at least).
Have fun and share your make if you are adventurous enough to print it.
The author hasn't provided the model origin yet.