You could always get a 1" threadless fork and then just get the lightweight shim that's needed to use a 1-1/8 stem. I have this setup on my 650c custom frame. 1" threadless forks are still pretty readily available and I think you can even get them new at Nashbar but in carbon. It looks cleaner then the quill adapter and quite a bit lighter.

Or you could find a Cinelli Grammo stem as they weigh as much as nice modern threadless stem and look extremely sexy.