It took me a few minutes to find this website, but I was able to download both the W7 64 and W7 32 drivers. The regular Sharpusa website seems to have some issues...I wouldn't waste your time there. This is a way better Sharp site.
Watch out for the driver download sites! They are ALL wolves in sheeps clothing! An hour searching for the right manufacturer driver is better than months of frustration at the crap they put on your hard drive! Good luck!