The basic principle of the turning weather cock is probably open source. The vertical design can be done by worker familiar with fibre glass..
Most of the people who make fibre-glass boats, should be able to make a the outer shell. A tulip like structure which lets in air on one side, the turbine and ball bearings are things that most turners and fitter can put together. If we can identify workers who can do this, we can do crowd funding to a coop. based on advance purchases.. Workers who have been laid off. in collaboration to the small turning workshops near auto manufacturing, or ship building units can be the core of decentralised production..