It looks like a team of doctors, engineers, etc. is gathering used CPAPs for ventilator re-purposing to support emergency need for hospitals with low supplies.

https://techcrunch.com/2020/04/03/sleep-apnea-retrofit-designed-by-doctors-and-engineers-could-help-address-ventilator-shortage/

Their site linked in the article is:

https://www.ventilatorsos.com/