About 6 years ago I inquired with Dave Levy at Ti Cycles Fabrication about modding my Ti Cycles Softride frame to a 1-1/8" head tube, as well as tweaking the head tube angle slightly. While I won't quote you the price, and it may have been affected by the fact that he built the original frame, I thought it was quite reasonable. I didn't follow through with doing it though (the frame is still hanging in my shop).