I'm looking into World One myself at the moment. Not sure though yet if French or German. I have however a uniform of the 3rd Zouave Regiment that was worn from 1832 to 1915.
I know a group in America that does the 2nd Zouaves and they already said they would help me getting the gear together.
Let me know if you want to go ahead with the World War 1 stuff, maybe we can work together on it.