You could always run a 7-of-8 or 8-of-9 setup by binning one ring on the rear cassette of an 8 or 9 speed in order to get it to fit on a 7-speed freehub.
Just a shame to see them ride past me around two weeks later, wheels, bars, brakes and gears replaced, and the thing turned into a luminous hipster fixie monster!
This is making me wish I hadn't sold my PY10 recently :(
http://img833.imageshack.us/img833/3598/peugeot4t.jpg
Mine was fitted with Campagnolo. Sold for £180.
Thought I'd post these seeing as there are so few of them kicking around in the UK.
It's a 59cm Dancelli frame in what I believe to be crimped Columbus SL. There have been suggestions that some of the Dancellis were made by Colnago, but I've never seen any hard evidence.
I've built it up...
Unfortunately it spreads open as you tighten the headset. In order to get it tight enough such that there is no play, the headset ends up too tight to turn the forks.