A really perfect (scientifically tested) wind noise reductor you can make in a rough form in 5 minutes for 0 $ ! If you want to make it more esthetical it will take you 10 minutes!
I did not find a satisfactory wind reduction solution for my small Sony Cybershot pocket camera. I researched the subject. I tested out all the materials suggested on the web in front of a heavy duty fan and ended up with four satisfacory ones. I then let the sound wave registration decide which one was most effective