I think that's going to be a tough find. I'm assuming you've exhausted all the internet possibilities??? There's actually a fair number of vintage/classic bike shops/suppliers that have been popping up over the last few years. I visited one in San Diego recently on Garnet Avenue - Rusty Spokes. They've got lots of stuff there.
http://www.rusty-spokes.com/
Here's a few more:
http://www.bicycleclassics.com/
http://www.mindspring.com/~heine/bikesite/bikesite/
http://www.sheldonbrown.com/harris/new.html
http://www.bike123.com/vintage.htm
http://www.sheldonbrown.com/vrbn-a-f.html