Check out PinkyPi - The full case version of this.
https://www.thingiverse.com/thing:3393553

And watch for the Pro version coming soon!

Waveshare 1.3inch IPS LCD Hat for Raspberry Pi / Raspberry Pi Zero.

Included are 3 buttons for use, (updated), I've now also included version 2 of the Joystick.

Waveshare IPS Hat on Amazon

The buttons are a slightly snug fit, and could possibly be thinned down by .1mm each, doing .2mm on each button left too much play in the buttons and they slipped out of place.

I've included the Google Sketchup files I created, feel free to modify / remix.

The mount holes work perfect with M3 or M2.5 screws

Update 1

I've included 2 new files, wLCDlip files.

These add a 3mmx1mmx1mm lip around the LCD screen to allow using a small plexiglass cover to protect your screen.

Update 2

I've removed the old files and replaced them with v2 of the files. These have been ran through a inspector application to verify all parts are ready for 3D printing.
I've also removed the non-lip version of the face, so moving forward it will always contain the LCD window lip.

Official forums
Crackedconsole.com PinkyPi Forums

The full build is almost complete, I'll be uploading an additional Thing with the full case design for a Pi Zero and Battery / Charger