Hello BaileyD,
I'm Jin, a fellow Windows 10 user and an independent advisor.
Drivers are typically available only through Windows Update or through the device's manufacturer website to download (this option might not be applicable on your case since your running Windows on a Mac via Boot Camp).
As for installing previous versions of Windows 10, Microsoft no longer officially host downloads on an ISO for older versions. However, you can use the link below to download older versions of Windows 10: https://tb.rg-adguard.net/public.php
This is a non-Microsoft website which would provide accurate and safe information. Watch out for ads on the site which are frequently classified as a PUP (Potentially Unwanted Products). There is no need to buy paid products to fix your computers as they do more harm than good sometimes.
Kind regards.