Was alerted to your website by the webmaster of the J. Lyons & Co. website. I do not have any good images of Kunzle cakes and have only been able to identify this one. It appeared in the house journal Lyons Mail in August 1970. The journal at this time was a tabloid sized newspaper and the pictures were pretty awful. This might be better than nothing until you get something better. Best wishes with your endeavours.
Peter