OLED display
thingiverse
An easy way to add an OLED display to a project it to add this "hole" to your design. Design files... https://www.tinkercad.com/things/9ewCcAFPVuJ-09incholed Plastic pillars are melted with your soldering iron to secure the display.
Download Model from thingiverse
With this file you will be able to print OLED display with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on OLED display.