Here is a New Old Stock Moprod 19mm Rear Wheel Cylinder for 

Fiat 

126 (from spares no. 4472133, 6130000, 5049226 on) 1970-87

126 de Ville , Personnel, 594cc, 650cc, 700, Bis 1977-92

127 900, 1.0, 1.3 1971-9/1982

128 all models including Rallye, Sport, Coupe, 3P 1969-84

133 1975-76

147 900, 1.1, 1.3 1971-84

600D Saloon 1966-69

850 all models including Coupe 1966-74

Fiorino 1979-10/1982

Yugo 

45, 55, 65 900, 1.1, 1.3 1974-91

311, 511, 513 1.1, 1.3 1974-91

900, 1100 1974-91 models.