Thanks! I found out that an alternator from a several machines and trucks work, like Actros, Citaro etc...
I bouhgt one one German Eaby for €77. All it needed was to exchange the pulley from the old one and voilá: 100A 24V.
It's even internally regulated, so easier to wire up.
Here's the numbers:
ALANKO 442965
BOSCH 986041030
BOSCH 6033GB3023
BOSCH 120468143
DAF 1516480R
DELCO REMY DRB1030
LUCAS ELECTRICAL LRA2504
LUCAS ELECTRICAL LRA02504
MAHLE ORIGINAL IA9413
MAHLE ORIGINAL AAN3112
MAHLE ORIGINAL 72735586
MAHLE ORIGINAL 11.209.422
MAHLE ORIGINAL MG587
MERCEDES-BENZ 111548902
MERCEDES-BENZ A010154920280
MERCEDES-BENZ 10154920280
MERCEDES-BENZ A0101549202
MERCEDES-BENZ 101549202
MERCEDES-BENZ A009154990280
MERCEDES-BENZ 9154990280
MERCEDES-BENZ A0091549902
MERCEDES-BENZ 91549902
PRESTOLITE 860563
VALEO 437441
VOLVO 20402404