The B10 is a nice pedal, but they seemed to suffer from lots of broken spindles... I remember seeing a pair of 'em down at Pacific Cycles, near San Diego, and one of them was broken too. Maybe you could contact them to find out which side, and if they'll sell it cheaply, or just keep an eye on eBay. I picked up a pair (not broken yet) on eBay for about $30 a couple of years ago.
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nice lugs baby!