I've bought both my Elite and the rat Vespa
from Scooter Source Inc.
Jim has owned/built a couple different Vespa P200's with sidecars. He can answer your questions.
Contact info here:
2001 HD XL1200S
1977 Vespa + 1985 Honda Elite
"Man whoever came up with Ronald McDonald was dropping some serious acid.." - SpoonKiller / tiotalruckus.com