United Kingdom
Burton Bike Bits
A great classic bike general store. They do not have a dedicated section to our scooters but thye do stock much of the standard Triumph stuff that was used for the Tigress. Many of the Batham bits were used on the Tigress and Sunbeam.
http://www.burtonbikebits.net/
Catmando Services
Wiring Looms to order and various standard switches
http://www.catmando-services.co.uk/
Jim Jack
Clutch Plates and brake shoes
http://www.jimjackservices.co.uk/cars.html
The Bearing Shop
Various Bearings (Metric and Imperial)
www.bearingshopuk.co.uk
Venhill
Made to order brake and control cables
http://www.venhill.co.uk/
Pattern Bike parts
Ingintion coil (some minor modification required to fit)
http://www.patternbikeparts.com/productinfo.asp?ProductID=12849
United States of America
Domi Racer
These guys seem great at making up parts to order and deal with parts for many old bikes
www.domiracer.com
Europe
No suppliers
Other
No suppliers