Given my recent reading it seems cheap!
After missing out on yet another rear Marchi to match the five spoke front I already have - I wonder if and how much a single sided conversion might be.
A quick google found a superb looking SV650 in the states with an MV back end but also, a few other Ducati's (but none as early as mine) - it seems that fitting almost anything else involves horrific modifications to almost all the of the rear.
re:
http://www.ducgirl.com/bike_projects.htm and how neat is this:
http://www.sv650.org/mvsv/mv-sv.htm F