This is the recent cost from MGCycle, Wisconsin, USA, for the "5speed" unit. For those looking to replace the scary flywheel of the Guzzi single plate clutch, this looks to be a worthwhile option to consider. Only the clutch pushrod must be machined to narrow the engagement end. Some discussion here:
http://www.v11lemans.com/forums/index.php?showtopic=20037&p=223099