Since I couldn't find any cases that I liked, I have decided to design my own. This case incorporates ZeroCam for Pi zero. It is designed to be attached to an Ante A8 printer threaded rod, but you can attach it so some other models as well probably...
The only part that needs support is the "insert". It is possible to attach a 25x25 mm fan over the processor, but so far I didn't have a need for it.