Yeah I looked for the TLC5940's also, seeedstudio has 13 in stock $7.90 a each. If you don't need 120mA sink, you could go with the TLC5941. Only big difference is it can only sink 80mA. They are just over $4 at Mouser.
Seeedstudio Link:
http://www.seeedstudio.com/depot/tlc5940-16channel-led-driver-weeprom-dot-correct-grayscale-p-215.html