I found a Peugeot UO-8 today!
Long story short, there's a "bike curmugeon" locally who fixes up old bikes and either sells them or gives them to neighborhood kids.
I was visiting the curmugeon while someone pulled up with a few bikes to donate and I helped unload them and I asked if he'd mind if I took one as a friend was looking for a road bike worthy of fixing up.
Don't know if my buddy will keep the Simplex components and Mavac brakes or convert it to a fixie but whatever they do, I'll post pics.
Harris Cyclery has a bit of info on the UO-8 line and there's other stuff online too. (a search of BikeForums.net turns up a lot)
http://home.wanadoo.nl/peugeotshow/images/1975_3.jpg
http://www.sheldonbrown.com/carapace.html#uo8