Concur - I have many of his issues including the TT and Bat Lash, some of the Aquaman are much more detailed than other artists of the day (with exception of Neal Adams). I envy you your original.
The art I “wish” I had was a certain cover Cardy did for the “Witching Hour” title around 1973, which depicted some witches on broomsticks flying out of a chimney. Deliriously eye-catching and surreal. Just brilliant. I always thought Cardy was seriously underrated.