This is a replacement button for a Hampton Bay doorbell purchased at Home Depot. There are several other brands that appear identical in everything but color that this would likely work with as well. The original buttons tend to crack and break when exposed to the elements.

I recommend printing in transparent or white PETG, as that will allow the LED backlight to show through the best. It should print fine with no supports.

To replace, unscrew the doorbell from its permanent location, remove the electrical wires, and circuit board. The button should be easily replaceable at that point. Then put everything back together.

To design this, I took a photo of what was left of the original and traced the outline in Inkscape to create an SVG, then used OpenSCAD to turn that into the full model.

The doorbell I used this with has since been replaced with a video model, so I can only provide a render and some stock photos of the original.