I've rooted around their build instructions and they suggest this Aliexpress listing: https://www.aliexpress.com/item/32984151266.html https://www.aliexpress.co

I've rooted around their build instructions and they suggest this Aliexpress listing: https://www.aliexpress.com/item/32984151266.html https://www.aliexpress.com/item/32984151266.html There is also a Croatian company "IstraStream" that will supply a ready-built system: https://globalmeteornetwork.org/?page_id=136 https://globalmeteornetwork.org/?page_id=136 There are a number of eBay listings for camera modules that contain an IMX291 sensor but they don't appear to be the same, and in particular don't appear to take power-over-ethernet. I don't know how easy it would be to integrate one of these, but they mostly ship from China anyway so there doesn't seem to be much advantage over the Aliexpress option. I also wonder how feasible it would be to use the default Raspberry Pi camera module. Probably the issue is that it is not sufficiently sensitive.