That doesn't exist for Jesus, the only mentions are about 75-100 years later. You would think someone like Livy, contemporaneous with Jesus would have recorded him.
Why would he bother recording some "random" Jewish rabbi?
It's also not hard to see why casual commentators might think this rabbi called Christos was still alive. Ask a Christian if Jesus is dead and ..
The earliest fragment of the Gospel of John that we have now dates to the reign of either Trajan or Hadrian. So within a generation of the recorded events we have copies circulating of an eyewitness report. The two earliest biographies of Alexander The Great were written by Arrian and Plutarch, more than four hundred years after his death, and they're still generally considered trustworthy. The legends and myths about Alexander only developed after that date. 30, 40, 50 years is not enough for significant myths/legends to spring up.
Really, there is no good reason to discard the four Gospels as historical records, given they were all written within the lifetimes of various eyewitnesses who would have served as a corrective if these texts were outright lies. Furthermore, none of these people had anything to gain by making Jesus up and much to lose. Who would go to death for something they knew to be untrue?
Beyond that, it's generally accepted that most of Paul's epistles were written before the Gospels, starting in the 40s. He records creeds he received from the early church, which he visited about ten years before in Jerusalem. He knew the apostles, including Peter and James, brother of Jesus, and was a student of the rabbi Gamaliel, who famously advised his peers to be cautious in their judgement of Jesus. Paul was therefore also in a position to know if such a Jesus existed, if Gamaliel ever spoke on him, or if any of what he was being told was an outright lie (in which case, why would he bother joining them, even when they themselves were less than eager to embrace him?).
See for example how he records an oral tradition which had been formulated and was already in use in the church by the time he came around circa 35 AD:
"
For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures, that he was buried, that he was raised on the third day according to the Scriptures, and that he appeared to Peter, and then to the Twelve. After that, he appeared to more than five hundred of the brothers at the same time, most of whom are still living, though some have fallen asleep. Then he appeared to James, then to all the apostles". (1 Cor 15).