Don,
your email set of off alarm bells, so I dug out 4 photos of a cool motobecane I saw from my "bike watching in Paris" series - where I got the Alex Singer pictures. This series of pictures was taken on the streets of Paris in 2004, after visiting Alex Singer Cycles in Levallois:
http://www.ece.ubc.ca/
I'm sorry I don't have better pictures of the fork or the seat tube decal. If I didn't take pictures of the seat tube decal, it's probably because that one was pretty far gone already (or maybe it was simply ugly!). This should get you started in finding the art you are looking for on your bicycle, good luck !!
- Don Gillies San Diego, CA
P.S. see also "Alex Singer Bicycles" in Levallois Paris :