Weekend of a Champion, Polanski's 1972 documentary (  http://www.imdb.com/title/tt0068178/?ref_=nv_sr_3 )which was a platform for Stewart's racing safety campaign was re-released with current interview footage at Cannes in 2013, strangely to co-incide with the release of "Rush".
In amongst the contemporary footage is Stewart, saying "In the 1970s, racing was dangerous and sex was safe. How different today......" or words to that effect. Given Polanski's history, I imagine he may have shuddered a little.

With its cracking racing footage "WoaC" held up very well, and spawned this poster, about 50 of which were printed. I have two of them.
I also have several pieces from the original release.