No-one answered this. I've found nothing other than naturebytes.
Lots of bodged tupperware cases on instructables. I'm waiting on an ir fisheye board as it happens and already pretty sure I will be bodging to waterproof it. Have hedgehogs to film this summer.
Are there any weatherproof raspberry pi cameras out there (wide angle with IR, this kind of thing but weatherproof https://thepihut.com/products/raspberry-pi-camera-board-night-vision-and-fisheye-160-lens-5mp )?
There seems to be a real dearth of weatherproof cases that can take a camera (pretty much only the Naturebytes one) or other weatherproof stuff.