Antonio: Welcome to the forum. You can find many valuable pieces of information and a wealth of knowledge in several fields. Not all of them can be found in one thread, but the search button will direct you to most of it.
I know that I personally have posted many progress threads on individual portions of projects, and read many others here. This thread is open to all who want to try and make their own version of the helmet. Not everyone will use the same techniques and materials as Antman, or me, or *.*.com.
Your question is pretty broad. Parts? What parts? As far as this thread has gone is 3-view drawings above. There are some good ones up there. There is even another thread in the clone section with a pepakura model.
Where do "Parts" come from? Answer: From the drawings and you.
please don't cut yourself or glue your fingers to the table, but if you do, take pictures.