The core experience is still available as a PDF via DriveThruRPG , which includes all the original creeds and Edges.
For players who want the X20 rule style but the Hunter flavor, the V20 Hunters Hunted II and World of Darkness: Ghost Hunters are the closest official books to a modern "20th Anniversary" system for hunters. Key Features of a Modern Hunter "X20" Build --- Hunter The Reckoning 20th Anniversary Pdf UPD
If you are looking for an "updated" experience through the Storytellers Vault or community PDFs, look for these specific re-balances: The core experience is still available as a