Joined: Jan 2009
Posts: 44,128
Likes: 6,348
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
As someone pointed out on another thread a year or so ago, it shouldn't be hard to make your own. Take a steel seatpost and a sacrificial stem with a long neck. Use the expander bolt and expander from the stem. Cut the bottom of the seatpost to accommodate the expander. Use a washer at the top of the seatpost. Voila!