Bring back column labels for the top 3 values within a pivot table

[Dobin1s]

I have a pivot table containing 80 column labels and 4000 rows of data values. what i need is a formula to find the top 3 values but to return the column labels and not the values themselves.

I've used the following to return the highest values corresponding column label but i'm not sure if there is someway i can write a formula similar to this but where i can have it going across three cells and each time i amend it to bring back either the column label for the top, 2nd or 3rd highest value.

=INDEX($B$4:$BO$4,0,MATCH(MAX(B5:BO5),B5:BO5,0))

Thanks