They should have them and a bunch more to choose from here:
Guru3d Video Driver Download Page
Clements, they have stuck with one driver the WHQL certified 41.09. True Nvidia changes drivers a lot, but its in the best interest of maximizing performance of their product. Its been this way since the TNT came out. I have no idea when a newer official version will be released, but I can guarantee you that within 24 hours of that release I'll have downloaded them and installed them.
Any driver beyond the 41.09 driver is probably a beta and is developed for specific testing of a certain function and may not be stable or even the best driver. Some beta drivers are specificly tweeked to maximize scores in certain synthetic benchmarks while not increasing performance in games one teenie tiny bit.
my take, is use beta drivers at your own risk, but it may be a rewarding experiance.
Heck if one was really adventurous, one could mix and match files from various releases in the same family (IE 41.xx and 41.xx but not 41.xx and 38.xx) to mix up your own personal dirver that is tailored to your needs. It may only buy you 1 or 2 FPS but when you really need to sqeeze the most out of your card it may help. As a note, I believe that there are web sites that discuss this mixing and matching in a little more depth but I dont know off hand what they might be.