Are you looking for the correct Nova 8-track player or just a GM one? Here is one on Ebay that is listed as 67 or 68 Chevelle player. I think it is a 67 player but it is one of the nicest looking 8-track player I have seen in a while. The auction ends in an hour. I have an extra 1968 Pontiac player.
James
http://cgi.ebay.com/ebaymotors/67-68-CHE...1QQcmdZViewItem
Just got this info from Team Chevelle.
1967 8-Track Player 7300481 Under-dash 8-Track* ###
### indicates this 8-track player mounts below the dash--ONLY installed in vehicles that did NOT have stereo MPX equipment.