Two parts and advice sources, both in the EST / DST time zone.
Both have a vast knowledge of old Triumphs and are willing to share that knowledge.

http://ct.local.yahoo.biz/t100toymakers/
The email address in the contact link is likely obsolete
I think he changed to earthlink.net as an ISP.

http://www.davequinnmotorcycles.com/cgi-bin/webc.cgi/Triumph_Parts.html