The driver could not be found by using their own "Find" utility while searching for beta drivers. I was able to (like you did, I'm assuming) navigate there by editing my Chrome address bar. The drivers have not been completely removed from the site or wiped from the internet but searching for the latest drivers (including beta) only turns up the WHQL drivers that were released October 24th.
I just tried it again to verify. I am searching for 560 Ti drivers for Windows 7 64 bit. Latest shown is 285.62 WHQL. The reason I am curious is that a lot of people have been having serious artifacting and other major issues with 560 TI's in BF3. I have had to underclock my card to under reference board specs (currently using 800/1950) just to keep games like BF3 and Skyrim running smoothly.
-Asrock P67 Extreme 4 B3 stepping
-Intel Core-i5 2500k
-Xigmatek Aegir CPU Cooler
-EVGA Nvidia GTX 560 Ti FPB
-HT Omega Claro sound card
-Corsair 850TX Power Supply
-8GB Corsair Vengeance DDR3 RAM (2x4GB)
-Intel Gigabit CT desktop network adapter PCIe
-60GB OCZ Vertex 2 SSD bootdrive (Windows only)
-640GB SATA II WD Caviar Black data drive