Thanks to the archival work of Natalie (@160B), here are three lectures Foucault gave in Tunisia. The Manet one was later published in a more polished form in La peinture de Manet which was then translated into English as Manet and the Object of Painting (and an illustrated version of the French is available open access here). There was talk, several years ago, of the other two being published in similar form, but this did not happen. The introduction, by Dominique Séglard, was published instead in Foucault Studies. On Foucault in Tunisia more generally, see this piece by Rachida Boubaker-Triki in Rue Descartes (both in French, both open access).
“Structuralisme et analyse littéraire”, Les cahiers de Tunisie, Vol 39 No 149-50, 1989, pp. 21-41. (dated 4/2/1987, which is clearly wrong, should be 1967)
”Folie et civilisation”, Les cahiers de Tunisie, Vol 39 No 149-50, 1989, pp. 43-59 (24/4/1971).
“La peinture de Manet“, Les cahiers de Tunisie, Vol 39 No 149-50, 1989, pp. 61-89 (20/5/1971).
Séglard notes in his piece that these transcriptions, which were unauthorised by Foucault’s estate, are not entirely accurate. They should be used with caution.