In addition to the Technics brand SZ-E2 & SZ-FC2 mentioned by Bob Hendershot, will the Technote brand 4 pedal Foot Controller: Model FC2, work on the KN7000 too?

I would say yes.

Thanks.
btw, Alec, I just attempted to send you email but the email was returned as undeliverable. Is your email server perhaps down? Can you plese email me again with your current email address? Thanks. - Scott