This is a case for a Sain 7" TFT Touchscreen marketed for use with the Raspberry Pi (although it works with at least Windows as well. Pictured print needed hacking to get things to fit, but I modified the design based on the required hacking. Print 5 of the buttons, one for each tac-switch.

I designed the buttons small, as my printer adds a bit to all horizontal dimensions (I need a new tip). If you find they're too narrow you can scale the horizontal dimensions up in Cura/etc.

Update: Here is the link to the document on onshape. You need a free account to see/edit it there. Let me know if this works or not in the comments: https://cad.onshape.com/documents/d53b79ed61c443e1b5f331a6/w/861a2262ca0d4b6da389ecae