It's on Youtube!
Poor quality, but, if you need your fix of this movie it's the best you're going to get without owning it. Starts with part one, of course.
Enjoy!
http://www.youtube.com/watch?v=PewefB1wjlY
Thanks, I watched it back in early 80s in theater, now three decades passed, I still remember the title of the film, a debut work by Diane Lane, she was really cute at that film.
perhaps a better version:
https://www.youtube.com/watch?v=K9eG2UMhTZA