http://vespa-vagabond.blogspot.com/

http://vespacrosscountry.blogspot.com/

http://modernvespa.com/forum/topic81350

http://www.littleblackstar.com/scoot66/

http://www.scootercannonball.com/

"Common" may not be the term for it, but it's definitely been done by lots of people.

By the way, have you asked her what method of transportation she'd like to use?