Hi C&V, I've been building up a Vitus 979 frameset I purchased with Dura-ace 7400, but I've run into a problem. The shifter mounts for all of the Shimano shift levers I've seen are curved such that they fit over the bosses and are flush with the tubing of the frame. However, on the Vitus frame there is a surface already there for the shifter to press against, and this is flat (see photo)

At the local co-op I was able to find a Suntour Accushift 7s lever that mounts correctly, but I'd like to have matching shifters for the rest of the drivetrain. Is there a name for the kind of mount (or shifter type) that I need? Are there adapters?