I very much doubt those websites actually own the rights to the manuals to prevent them being distributed. They are just making money out of selling hard to find manuals. Like the user manual I would think the rights still actually belong to Panasonic.

I would think that the only copyright documented in the manual itself would be for Technics/Panasonic and not the website that sold it. I would be prepared to make the service manual available here on Synth Zone so all KN7000 owners could get it, and deal with any copyright issues myself. Though I very much doubt there are any.