This design seems pretty odd to me. You already have to have a machine that cuts thin sheet plastic to make the transparent shield part, right? The actual headband is then just another small piece of plastic sheet in Apple's (and others) designs. Seems to me that adding in a 3d printer can only slow things down, since it would be much faster to simply cut the headband with the same equipment that is cutting the shield.
I've been making these for a couple weeks now. The clear plastic part is generally sourced using the thick binder/presentation covers that come in 8.75x11.25 inch sheets, precut. The only requirement is a hole punch. Headbands can be any elastic material (I've been using button hole elastic for easy adjustment).
I'm not actually sure what you're saying, then. Why is the 3d printed version odd if the transparent part is easily sourced without needing a die cutter?
The part that is being 3d printed in these designs is easily sourced without a 3d printer. Look at Apple's design. It uses a piece of the same transparent plastic in place of the 3d printed part.
