No, I meant what I said:
. . . just before the referendum a YouGov poll showed that around half of intending leave voters would be happy to remain in the EEA.

Any source for that wild assertion?

The link I created from your rough description of the page seemed to match what you wanted, but the closest to your words (quoted above) that I could find was:
UPDATE, 13th June 2016: A Yougov poll in the Sunday Telegraph, sponsored by the Adam Smith Institute reveals almost half of Leave voters would consider the EEA Option after a Leave vote

Percentages aside, I see a big difference between "Being willing to consider the EEA option", and "being happy to remain in the EEA".

Your use of English may see them as identical.