http://www.canecreek.com/component-other?product=ergo-stoker
These are the stoker levers typically used for tandems, but they are also useful for fixed gear riders that like the 'on the hoods' position. And mate well with single lever/brake fixies.
Stoker levers were also spec'ed on Bridgestone X0-1s with moustache bars.
http://www.sheldonbrown.com/bridgestone/1993/pages/30.htm
NOTE: Mine have *GUM Rubber colored hoods with SILVER lever stubs*
$30.00 (plus shipping if needed).
thanks,
Taz
Atlanta, GA