Link for this movie

Brigitte Lahaie
in Enquêtes aka Call Girls de Luxe (1979) 1h 17m
Proof:
https://www.egafd.com/films/details.php/id/e00009
https://www.imdb.com/title/tt0178410/
Full movie:
https://xhamster.com/videos/enquetes-35mm-remastered-14525768
https://tubepornclassic.com/videos/1085749/call-girls-de-luxe-2k-1979-porn-france-lomay-cathy-stewart-and-brigitte-lahaie/

Brigitte Lahaie
in Enquêtes aka Call Girls de Luxe (1979) 1h 17m
Proof:
https://www.egafd.com/films/details.php/id/e00009
https://www.imdb.com/title/tt0178410/
Full movie:
https://xhamster.com/videos/enquetes-35mm-remastered-14525768
https://tubepornclassic.com/videos/1085749/call-girls-de-luxe-2k-1979-porn-france-lomay-cathy-stewart-and-brigitte-lahaie/

Brigitte Lahaie in move Enquêtes from 1978
Full movie : https://www.xvideos.com/video31288711/_xxx_classic_fr_alpha_france_gerard_kikoine_1978_enquetes_brigitte_lahaie_desiree_cousteau_karine_gambier_morgane_cathy_stewart_converted_

@maxione not sure, but OP may want complete movie if you can find it, great job on answer though