First off: I'm a huge Orson Welles fan and this really is the best Welles resource on the web.
I found a complete interview that Welles did in 1960 for the CBC show Close-Up. I don't know if anyone has seen this before; some random clips have been available on Youtube for a while, but this is the whole shebang; all 54 + minutes--and it's a fantastic interview. Welles sites, at point, that Quixote is complete and titled: "Don Quixote Goes to the Moon." The interviewer asks some great questions and Welles is so incredibly and genuinely thoughtful in his responses. Enjoy (if you haven't seen it already)!
http://archives.cbc.ca/search?q=orson+w ... &RA=0&th=1