We hope to be able to point you in the right direction for the information you need.
Triumph Register of America
TRA is a non-profit organization established to aid TR2, 3, 3A, 3B, 4, and 4A owners in the preservation, maintenance and enjoyment of their classic sports cars and is concerned with establishing local groups of TR2, 3, 3A, 3B, 4, and 4A owners. TRA is firmly a grassroots organization, which offers many advantages and services for individual members, groups, and local centers.
Visit them at http://triumphregister.com