I am having the same problem. I wonder if the product number is something besides CL007. I did have some luck while browsing the Zenith website.

I found the codes I needed on this .pdf file: [Link: zenithservice.com]

There are more codes if you go to http://www.zenithservice.com, then visit Product Support, Users Manuals, Accessory. I was unable to find one specifically for CL007, but the one for ZEN550 seems to work.