The high demand and shortage of surgical and N95 mask has lead many group to improvise and build their own. It's not clear who will be accepting DIY shields and masks since the mask and shields haven't been qualified. The links below are a random sample of the active projects.

Boston Children's Hospital

• COVID-19: Our response to the N95 shortage

NY Times

• What’s the Best Material for a Mask?

Christina Cyr at tdoor.com provides info on 3D printing shields

• Face Shield Update

Adafruit Shield design

• Visor 3-Hole Design
• PPE order instructions

Washington Post

• Which DIY mask pattern should you use? Even experts can’t pick one to recommend

3D Verkstan

• 3D-printed protective visor

Cornell Weill Medicine

• Studio V
• 3D printed face shield

Wikipedia

• Respirator

Linus Tech Tips

• 3D Printing 300 Face Shields… PER DAY

c&en

• Why the best material for a homemade coronavirus face mask is hard to identify

ACS

• Aerosol Filtration Efficiency of Common Fabrics Used in Respiratory Cloth Masks
• Corrections

Actuated Medical

• Face Shields