I did a little searching and at
http://www.itwasprinted.com found that he designed at least 3 other leaflets/books with cats for Leisure Arts:
1) "The Little Ballerina" #401
2) "Innocense" #467
3) "Spring Symphony" #582
This site also showed the covers.
Plus, some of his designs were published in
For the Love of Cross Stitch magazine, "Old Blue Eyes" was one, in May 1989, I think.
I hope this helps you find what you're looking for.