There's a nice restored 1948 Bottecchia with Campagnolo cambio corsa at Rydjor Bicycles.
They've updated the site since last time I looked, so it might be worth checking-out the improved pictures:
http://www.rydjor.com/
IIRC, This bike came from Mario Girasa, who purchased it from CyclArt.
Aldo Ross
BlueBall, Ohio