Contact your local visiting nurse and hospice organizations. Check w/the local churches. Some sleep labs do some pro bono work on occasion, check w/some of them if they might know of someone in need. Be able to tell them brand and model of CPAP.
ResScan 3.10 - Resmed S8 ResLink & oximeter
ConTec CMS-50D+ oximeter - Philips EverFlo 5L Oxygen Concentrator
PR SystemOne BPAP Auto w/Bi-Flex & Humidifier - EncorePro 22.214.171.124