No. I have not seen a rebirth account from a life in the time of the Buddha.
Yes. It would be interesting to hear such an account from someone who had seen the Buddha.
However, most past-life accounts that I have seen are within the past 100 years.
P.S. Here is one of the “oldest” rebirth accounts that I have seen:
“Boy Who Remembered Pāli Suttas for 1500 Years“