Most scooter sidecars are on vespa. As other have said Texas sidecars make them but wow 4 grand . I ve posted here about the duck which as side care build for a helix. The guys used an old 80 cc kids bike for the wheel and shock. Wield up a frame for it . Bolt under th Search the forum for more post of them. eg http://www.advrider.com/forums/showthread.php?t=647654 http://www.advrider.com/forums/showthread.php?t=649352
Also search for honda helix the duck sidecar. http://autos.groups.yahoo.com/group/.../message/25610
Life's journey is not to arrive at the grave safely in a well preserved body,but rather to skid in sideways totally worn out shouting WHAT A RUSH, WHAT A RIDE.
"Life is a tragedy when seen in close-up, but a comedy in long-shot." Charlie Chaplin