Stan,
Welcome aboard! We're a small group so far since they didn't make very many of these rigs.
Here are a couple quick replies to your questions.
You can get the aluminum curtain track here -
http://www.vintagetrailersupply.com/pro ... ts-701.htm. They also have the tabs that you sew onto the curtains.
See the window discussion under the techincal forum for information on the weatherstripping.
http://hallgtc.com/forum/viewtopic.php?f=4&t=19. There are sources for the fuzzy track and the sweep strips listed there.
Matt Tritt just did his windows and he'll be posting some information and pictures on the project.
Send me some pictures of your GTC and I'll create a page for you on the site.