Mike, you might start by seeing if you can find a Nieuport-ish 1/3 scale cowl/pot somewhere. If not, you might want to stick with 1/4 scale.
My guess is that about 6 months to a year from now (the release of Flyboys!) there are going to be a TON of Nieuport 17's out there!!! I'm ahead of the curve with my Flair Legionaire just about ready.