Join the Slack group! This is heavily geared toward sewn masks but 3D printed face shields are also a topic http://communitymake.slack.com/
CORRECTION. The original email address is likely misspelled. From a friend with Health Canada "Unity Health #Toronto accepting PPE donations& other supplies. Please email PPE.email@example.com 2 donate. Team is reviewing requests & determining what can be accepted.“ 
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!