The Bianchi Campione in the attached pic has a 1" threaded headset with the steerer converter you mentioned and a 1 1/8" riser stem.

I've attached another pic that shows the bars on the same bike. Sorry, I don't have a close-up of the adaptor. I've since moved this set-up to a Cannondale I recently purchased. The adaptor works very well, I will probably convert at least one more bike using one of these.