I've seen Huret Jubilees from around 1973ish... As far as tracking one down, that may prove difficult or otherwise "not worth it" but the later models were pretty sweet looking for what they are.

All I know is most Simplex brand stuff from the same timeframe (think "bike boom" era) is plastic and crappy, but if you can find it, it shouldn't be all that pricey. I might be wrong, I've never had to source full parts groups or any real period specific action for Frenchy bikes. I just fix em up when they need (much?) love.

[EDIT]
Just wait until a more civilized hour (at least where I am, its 3:15AM) and there are a couple total French vintage pros around these parts that can help you out a lot more than myself!