As far as I know, there are no such manuals online.
I have the original Nikon E2N manual, and I'd be happy to answer any specific questions you may have. I'm afraid I don't have the time to scan the entire manual (so much to do, so little time..)
One suggestion: You can download a PDF version of the Nikon F4 manual. It's a different camera, but you'll recognize many general features and settings:
http://188.8.131.52/files/photography/N ... k/f4bk.pdf
Hope this helps.