I have been doing some research in response to a post by Chris58 from down under in the Squarebirds Forum. I have found several sources for Tbird parts, mainly in Australia and one site also covers New Zealand. I will post them here, and if others in those two countries will tell me here who they get their Tbird parts from Down Under, I can add them to the list. What I will do is to add that information into the Advertisements Forum under an Australia/NZ Tbirds Parts Source thread. Here is what I have been able to Google and find so far.
All American Auto Parts
Eagle Auto Parts
1961-1966 Thunderbird Parts From Parts Cars
The next link is to many Australian/New Zealand Wrecker websites. To find the New Zealand ones, click on that link in the first website.
Many Australian Auto Wrecker websites. To find other parts of Australia and New Zealand, click on this website first. The second link is for Victoria only.
If those of you Down Under know of other Tbird parts houses in Australia and New Zealand, please add them to this in a separate post. I will gather them up and add them together with this list.