ID card holders: I printed these in PETG with a 0.2 layer height, 3 perimeters, gyroid infill at 15% i recommend that support is required everywhere. You can add text in your slicer. If you have the text raised, you can do it on a single-colour printer by pausing where the text starts and doing a colour change. where the text that is flat i done it on my multicolour printer

I have 2 card holders, just a basic one and one that can have text added