Excellent French site with most pages available in English. Lots of information on all models
http://www.multimania.com/bsuzanne/solex
Useful Velosolex diagram site
http://geocities.com/solexoldtimer

The U.S. sites for new Velosolexes
http://www.velocruz.com
(Velosolex club and spares, too)

www.velosolexamerica.com

UK retailer of new Velosolexes
http://www.velosolex.co.uk

Websites who were helpful and replied to enquiries for old bike parts

http://www.sjscycles.com
Splendid shopping mall

Avon Valley Cycles

http://www.bikefix.co.uk
http://www.orbit-cycles.co.uk
http://www.deesidecycles.com
http://www.edinburgh-bicycle.co.uk/

Cycle Enthusiast sites
A great old bike site from an American enthusiast with a passion for English bikes
http://weeds.mgh.harvard.edu/~hanczyc/

An American site with lots of useful information on all aspects of bikes
http://sheldonbrown.com/