hubs that have 126 spacing are usually too inexpensive to be sold on ebay, but they do show up occasionally. best to get a whole wheel if possible. look at craigslist too. wheels sets and individual wheels show up there often.
what makes it even more difficult is that the people who have them don't know that they are 126 and you may have a hard time convincing them to take a measurement, or even HOW to take a measurement. one thing to note. often these types of hubs carried 6/7 freewheels. so you could key on that when looking. bike swaps are a good idea too. take your metric ruler with you.
126 is not dead as far as i am concerned. all my road bikes have 126 spacing and believe it or not i am specing a 126 spacing on my new semi-custom ti frame. i like the 6/7 speed/cassettes and freewheels that they were designed for...
Last edited by hueyhoolihan; 11-22-11 at 08:23 AM.