Maagar Mochot conducted a poll of 437 people with a 4.3% margin of error for 103 FM radio that was broadcast on Feb 8 2019. The poll was conducted on Feb 15 2019.

Do you want to see Ehud Barak return to the political leadership in the upcoming Knesset elections?

54% No, 34% Don’t care, 12% Yes

Note: The seat results are identical to the seat distribution Maagar Mochot produced for Yisrael HaYom on the same day. I have updated that poll to reflect the numbers without the parties that didn’t cross the threshold.
Those results are here: