Fellow pilots!
Wake up and smell the coffee -- there already IS such a body, and it's called the ECA. Through local/national unions, over 38.000 (yes, 38 thousand) pilots in europe alone are members. Also so, they are members of the IFALPA that has more than 100.000 members worldwide.
Why the sudden rush to reinvent the wheel? Remember that the very spirit of unionisation is to unite -- join in and have a say. Even if you will not get it exactly 100% to your liking, history has proven the effectiveness of collective bargaining. What needs to be done is local; and I'm sure your national umbrella organisations will help you set up a union if you don't have one already.
I was lucky to get hired into a healthy company where the union works with the management, not against it, towards our common goal, which is to help build a strong, profitable operation, but not at any cost.
Proud member of ECA and IFALPA