I broke a spring bar in the band for my Citizen watch.  A replacement from Citizen would have been $10 for 2 bars.  After hunting around, I found this... saved myself $3 and got enough spring bars to fix everyone's watch in the neighborhood.

The bars themselves are pretty nice.  They have the little ridges so that you can get a spring bar tool on them in tight spaces.  They are almost identical to the type that are on my watch.