The ID of 1 1/8" Quill-compatible steerers is one inch (25.4 mm); Nitto and others make exactly what you need. Yeah, some come with/require a shim. But the Nitto that I pointed you to is not one of them. They apparently make two other versions: The MT 22.2. to convert from an inch steerer to an inch ID stem, and the MT 28.6, to convert a 1 1/4" steerer to a 1 1/8" ID stem (a potential godsend to Santana owners!).