Why not make up your own local rule. It could be:- Each player declares for or against another move; Each player then throws the health dice type for the highest character still on his/her feet; Count the 'Votes' (Dice again if a draw).
Example- Player 1 (in favour of another round) throws a D10 & scores a 9.
Players 2 & 3 (against another round) throw a D10 & a D8, but score a 3 & a 5.
9 votes for another round, 8 votes against. Therefore there will be another round.
Alternatively you could use the method in the excellent Peter Pig game 'AK47'. In that one of the players rolls a D6 at the end of the move & the score is taken away from a run down 'clock' so, for example, the 'clock' now stands at 6. At the end of this move the dice is thrown, and if the score is '6' the game ends, but the game could go on for up to six more moves if the person throwing the dice keeps throwing ones. I have a great knack of throwing ones in a wargame, but never when I want to.