I had some good and faster prints with https://www.prusaprinters.org/prints/27477-covid-onx-protective-shield-1620-shields-per-day-o/files I just dropped off a batch of these to Nathan, looking forward to feedback from him when he cleans and assembles.
I thought that this would be a low material option, https://www.prusaprinters.org/prints/27436-protective-face-shield-hyper-speed-remix-rc3hx-5mm. I also gave some of these. They may be too thin. PLA went okay, some challenge to separating afterwards but okay. PETG was too fused and I lost all of the tray while separating.It was a dangerous task. PLA versions might be worth printing Waiting on feedback.