Sinny,
Welcome.
You mentioned a collection of TTB things.
You'll want to go to http://www.thomastownsendbrown.com. I built the site a number of years ago, and it contains just about everything Linda Brown has / had in her archives, plus a number of documents I (and others) tracked down over the years.
The only significant thing it doesn't contain from Linda Brown's files is the "Rain on the Windows" papers. I had a copy of the entire set some time ago (long before Morgan / Smith / et al. reportedly took some of the pages), but it was just a few chapters from the Starseed book and a note from TTB.
Also, the "Kitselman" calculations and Structure of Space documents are also not there, but floating around the internet after I moved the website over to Linda Brown's site for her to take care of.
Enjoy !
Andy