A collection of audio recordings of Foucault – in both English and French – can be found here (via Clare O’Farrell’s Foucault News blog).

Some of these have been available before, and some of the dates are wrong. The last ’11 lectures’ are actually from 1966, and are the individual tracks of 2 radio lectures taken from a cd recording. The running order is messed up too. More details on those lectures here.

I would also be surprised if ‘L’herméneutique Du Sujet Le Courage De La Vérité’ was actually from 1978.

There are also some recordings available at foucault.info.