I found the following in the archive:

To: cbunix23@yahoo.com
Cc: Warren@plan9.bell-labs.com, Toomey@plan9.bell-labs.com,
        <wkt@tuhs.org>
Subject: Re: cb/unix tapes
From: Dennis Ritchie <dmr@plan9.bell-labs.com>
Date: Tue, 15 Jul 2003 21:23:37 -0400

They've arrived on my doorstep; thanks, Larry.
9-track drives seem thin on the ground, but we'll
see.

        Dennis

Does anybody know what became of those tapes? I know it was 13 years ago, but it's one of the few sitings of CB-Unix tapes I could find...

Warner