The Scripture was still in existance and they had that whether it had the Catholic church stamp of approval or not.
Yup, hundreds of them. BTW, I'm not a Latin, but I most certainly am a member of the One, Holy Catholic and Apostolic Church, as my family has been for at least 1800 years!
The only reason they had the Scriptures back then and why you have them today, is that the One, Holy, Catholic and Apostolic Church ( both Greek and Latin believers ) received the books, copied the books and examined the books in light of the oral Apostolic Faith they received in order to determine which books were canonical and which were spurious.
Everyone who accepts the 27 book NT honors this Catholic Tradition in doing so, whether one realizes it or not. Thank the holy monks who labored millions of hours hand copying.