After recovering from his hip surgery, Costello returned to active competition at the age of 56, teaming up with Tony Charles to form yet another version of The Fabulous Kangaroos. The team defeated Dominic DeNucci and Chris Markoff to win the Detroit version of the NWA World Tag Team title, the same title that Costello and Kent had previously held. The Kangaroos title run was short, however, and they lost their gold to "Crazy" Luke Graham and Ripper Collins. In 1977 Tony Charles was replaced by Don Kent and the two reunited for a tour of Puerto Rico with the World Wrestling Council (WWC). In Puerto Rico, the Kangaroos arrived billed as the WWC World Tag Team Champions, once more to give a newly created title legitimacy. They dropped the titles to Carlos Colón and Jose Rivera on 12 March 1977. The Kangaroos remained in the WWC till 1978, chasing, but never regaining the WWC World Tag Team Championship. After their tour in Puerto Rico ended, Don Kent returned to singles wrestling, and Costello refocused on managing.