Puss 'n' Boots survived the comic's merger with the Topper, where they appeared for a good two-and-a-bit years until late 1979. John Geering's madcap scripts and action-packed visuals meant the story would continue to recur in various incarnations over the next thirty years, with the twosome long outlasting their creator. However, after they vacated the pages of the Topper, they would not get another run in a weekly comic until they arrived in the Dandy in 1987 under the name Mutt and Moggy, a significantly different take on the concept sometimes described as the Muppet Babies version of the strip. Mutt and Moggy later evolved into something a bit closer to the original version, and they returned to their original names, and designs, for another run in 1993. You can find a fuller history of the strip, written by some idiot, here.
However, despite not having a home in a weekly comic, they made several appearances in the Dandy Comic Libraries from around 1984. One issue in particular is of interest: number #176, Puss 'n' Boots in 'Tee' for Two! A quick estimation puts this issue's release date in early 1990, but the Comic Libraries tended to be done quite a way in advance and it's possible it had been on the shelf for a year or two, if not longer (a Comic Library released in 1989 starring a solo Cuddles, before his strip was merged with Dimples, must have been done at least three years earlier).