But I have no idea where you live, so that might not be a good option for you.
A bit south of Sweden. There are several online shop still indicating they have them in stock, but after contacting by phone they all say they ran out. If you can wait for shipment from China that may work. eventually. Using phones as USB webcam is a mess, require android debug systems, phones overheating, wrong sound source, 2 second latency, etc.