It will be the league that collects club marks rather than county.
And yes, unless there is a particular low mark that they believe is justified or a concerning pattern of low marks, likely the most you'll be able to get is your average and the league average for comparison.
If it's just general interest then that should be enough? If there is a particular game that you are concerned is likely to get low club marks, it's probably to just directly ask the referees secretary if they've had any feedback on that game rather than being coy and asking for marks. Most Refs sec's are smart enough to know that unbalanced marks in one game will usually correlate with who won and lost and will take it with a pinch of salt in those cases.