For sale I have a Doppler ER3 with clutch function for motobecane. You can use this without a clutch pulley, or with a clutch pulley as long as you use a scrap of cardboard (or whatever) to start it.
Also for sale is a Doppler Clutch Pulley with the Tomahawk upgraded posts and brace already installed.
This is $497 worth of stuff on treats.
$140 shipped for the ER3
$260 shipped for the clutch pulley with brace
$380 shipped for both