Johnsperformance.com is a sponsor of this site and gives rapid and superb service. He has more TTA specific parts than any vendor I know. You can check here for other vendors who support the site and who have LC2 specific expertise. Jan Larsson and Lunkan have a long list of contacts too, so post here when you run into problems.
Also, the TTA FAQ List has some links to specific threads containing sources for TTA parts.