Ebay works, sometimes.

Really the best source for lower end old French bikes is stripping another older french bike. I'm not familiar with your model, I think it's an old folder, but I've never run across one. Does it have cottered cranks? If so, it probably had the old Nervar BB cups (i am guessing here) common on the UO8 and other like models.

I'm not sure what you plan to do or what you plan to upgrade. Give us a bit more info, and I'll pass on what i know, which I'm steadily finding isn't all that much.