Hello Vincenzo and welcome to the discussion board,
I received your private message. The Online shop attached to this website sells Kits for the complete Generator part. There is a small Version for turbines of up to 3m in diameter and one for bigger ones starting with 4m Blades up to maximum 5.5m.
We do not offer metal kits but they are easy to build - any local fitter / metal worker can do the job for yo. He will also be able to arrange for proper coating. It is just important that you keep the right dimensions and measurements.
What size of turbine are you planning to build?
For various diameters of turbines there are instructions for the metal frame work on the other power site and I suggest you make a drawing and copy the the dimensions:
www.otherpower.com
Another guy that has gone a long way with similar approaches wrote a book on building such turbines. It includes all the plans and dimensions. you can find this one in our online shop. We have it in english language.
The older versions of the plans are free and available on this website:
http://scoraigwind.co.uk/all-o…-get-them/
Max