Last fall, I spotted an eBay auction for a Raleigh fork plus head tube and headset. Evidently, someone had sliced this head tube right off of the rest of the frame from a Super Course:
Note: It did not come with a head badge.
Skip ahead a few months, and I scored a cheap Super Course on CL. Unfortunately, the fork of that one was tweaked. Fortunately, the earlier one I had picked up on eBay was the right color and size. Problem solved.