Have you tried the LaserJet 1320 Vista x64 drivers from this page to see if they work? (btw, I needed to put IE8 in to compatibility mode to view that page as the text was so small).
Also, here is the page for the Vista x64 Scanjet N6010 drivers. Please try the bottom driver on that page to see if it works in W7.
Hi Jules. I am running an old 1320 on Windows 7 32Bit and 64Bit. As you have found, those are drivers only. I do not know where I originally got this 64Bit vista file from, but it is the complete software with an install. You will even find Microsoft will update it for you from time to time. For your convenience, I have put it on my hosting site. It is a little slow but best I can do. Grab it from: http://www.divshare.com/download/10204977-cb7