Correct alternator controller/rectifier for Mopedauto Exot

Hello, I am currently restoring a very rare moped car from the company Allcars from Italy. The Mechanic components are now working, now it should go to the electrics… Information or even spare parts are unfortunately hard to find for this rare vehicle. The part of which I think it was the controller is not much left. A manufacturer or similar can not be recognized either. For this reason I wanted a universal controller, or one from a similar Fa Only I have no idea what I have to pay attention to (correct dimensioning(ampere)? Regulator or rectifier? or both? Then in a component or separate? How to connect, cable? etc…) A 50cc 2Tact moped motor by motori morini with out-of-print ignition coil is installed. Under the pole wheel of the engine, I know there are two light coils and the interrupter with capacitor. According to the operating instructions, the motor delivers 75w at 12v. (like the one for light, H upe, windshield wipers etc… should not be enough?!) The board system in general also runs completely with 12v If you still need information please let us know. Thank you very much in advance! I look forward to your contributions.