There's not a lot out there but there are a few European cards. Here is a RPPC of him, signed on back:
Another Eurocard, Indiana Sport:
Victor "Young" Perez was a flyweight champ of Tunisian descent who lived in France. Come WWII, as a Jew he was betrayed to the Nazis and sent to the Auschwitz death camp in Poland where he was forced to fight gladiatorial contests for the amusement of the guards. If he won, he was fed. If he lost, he would be executed. He never lost. He was finally murdered during a death march near the end of the war when he shared some bread with a fellow prisoner in defiance of a guard's orders.