Postby Duck! » Tue Apr 08, 2014 11:27 pm
It's correct that carbon frames can't be stamped, so the serial number is usually on either a decal applied under the clearcoat (so it can't be peeled off without leaving an obvious mark) or stamped on an aluminium plate that is rivetted to the frame.
It's unusual that you can't find anything; a newer Bianchi that I had in for service yesterday has its number on the underside of the bottom bracket, where one would normally expect to find it.
Sola Sports haven't been the Bianchi distributor here for all that long, so it could be worth calling the former distibutor Bikesportz - they may have a bit more insight to models older than the last couple of years.
I had a thought, but it got run over as it crossed my mind.