Originally Posted by
Andy_K
The City Bikes annex, a couple of blocks from Universal, has a box full of them, but they ask eBay-like prices for things that are in "as found" condition. Community Cycling Center might have something, but I haven't specifically looked for clamp on things there.
Ditto on Citybikes Annex, although they're rearranged things to put the "grab bag" parts behind a sign. I can't remember if you can dig through the bins any more.
Norther Cycles appeared to have a collection of clamp-on stops when I looked last.