I've always seen it spelt as Quarrymen, Jane.
Mairi, thank you very much! It is that some fans are still not sure about the correct spelling. Can you tell me as a native speaker if there are any such words spelt in two, cause I don`t think I`ve come across any two-word spelling, but only: milkmen, firemen, policemen, spokesmen, fishermen, workmen, countrymen, etc. Do you ever write them or words of the kind divided into two? )))