It is common that people wish to upgrade the front brakes to a more conventional rotor on front of hub and vented rotor setup. The consensus is “Swift / Alto / Geo Metro”, but never really any more specific details than that. Below is the part numbers of the setup my black car came with — again, I have little clarity as to what exact model the parts are from.
Diagrams and part numbers for the stock Suzuki Alto / Alto Works Cx11V front knuckle setup
Diagrams and part numbers for the stock Suzuki Alto / Alto Works Cx11V front brake setup