I saw I didn't ad a list of cars where this piston is used on this forum.
Well, better late then never.
CITRO - VISA - 0.6 07.82-03.91
CITRO - VISA - 0.6 09.78-06.88
CITRO - VISA - 1.0 09.84-06.88
CITRO - VISA - 11 E 09.78-06.88
CITRO - VISA - 11 E 07.82-03.91
CITRO - VISA - 11 E 09.78-03.91
CITRO - VISA - II Super X 07.80-06.82
CITRO - VISA - 14 07.84-03.91
CITRO - VISA - 14 GT 03.82-03.87
CITRO - VISA - 14 GT 03.82-03.91
CITRO - VISA Convertible - 11 RE 03.83-10.88
CITRO - LNA - 0.6 07.82-04.85
CITRO - LNA - 0.6 11.78-07.82
CITRO - LNA - 1.1 07.82-04.85
PEUGE - 104 - 0.9 10.72-10.79 01.75
PEUGE - 104 - 0.9 10.79-10.83
PEUGE - 104 - 1.1 08.80-06.88
PEUGE - 104 - 1.1 07.76-08.82
PEUGE - 104 - 1.1 09.78-09.79
PEUGE - 104 - 1.2 08.79-06.83
PEUGE - 104 - 1.4 08.79-06.83
PEUGE - 104 Coupe - 0.9 09.73-10.83
PEUGE - 104 Coupe - 1.1 08.75-06.80
PEUGE - 104 Coupe - 1.1 08.79-06.88
PEUGE - 104 Coupe - 1.1 08.79-06.83
PEUGE - 104 Coupe - 1.1 09.73-09.79
PEUGE - 104 Coupe - 1.4 08.79-06.84
PEUGE - 304 (_04M_) - 1.4 D (M20) 10.76-10.79
PEUGE - 304 Break (_04D_) - 1.4 D 10.76-10.79
PEUGE - 305 (581A) - 1.3 11.77-09.82
PEUGE - 305 (581A) - 1.3 11.77-09.82
PEUGE - 305 (581A) - 1.5 11.79-09.82
PEUGE - 305 (581A) - 1.5 05.80-09.82
PEUGE - 305 (581A) - 1.5 Diesel 11.77-09.82
PEUGE - 305 Estate (581D) - 1.3 08.80-09.82
PEUGE - 305 Estate (581D) - 1.5 08.80-09.82
The original Peugeot number for the piston = 4448.37
Also the calipers for the front are still for sale.
http://brake-caliper.net/brakecalipers_1100_1980_1985_TALBO_MURENA_brake_caliper.html