I found the same ones, Sage, and Worldcat didn't help, although that may be because I don't know how to search properly! If you ask on the dot.com Board, there are people who have access to loads of reference material. There is a thread, 'Ask any question ... '

http://forums.ebay.com/db1/thread.jspa?threadID=2000522641&start=0

Is there any chance that's it's a rebound part copy? Can't think why anyone would do that, though.