The following links are a few sites which I have found whilst searching for help during this project.

http://www.scooterhelp.com
A cool site offering how to guides, diagrams and all manner of helpful subjects.

http://www.modernvespa.com
A great forum of vespa enthusiasts, always ready to help out with problems and suggestions.

http://www.scooters.co.uk
A dedicated scooter shop in Nottingham who say they can supply pretty much ANY part I want.

http://www.sandwell-uk.com
The guys I am using for bead blasting and cleaning up various parts.