Thats an odd request. It is not uncommon to get both. I know a lot of dogs of different breeds.
Here are a few
In 1991, our Tony, Am/Can. Ch. Klassic's Eye of the Tiger
In 1987, John Harper was instrumental in Sue acquiring Reliant the Right Stuff. In a short period of time, Chuck became Am/Can. Ch. Reliant The
Show win was in March 2004 with "Jambo" (Can/Am/Int'l/Columbia/Ecuador/Puerto Rico/Costa Rica Ch Terrarust N Akuaba Jamboree,
My first Best in Show win was in September 2003 with "Gizelle" (Am/ Can/ Int'l Ch Terrarust N Beaubri's Special FX whom I co-)
addition, our boy, Ranger, brother of Dancer, also departed this earth due to cancer. He was a FCI, Sicalam, Puerto Rican/Mexican/Canadian, and U.S. Champion, for a limited, but very promising specials career.
Should have a place showing them.
It is so common, not sure there would be one. Lots also get international championships.
Another interesting (to me more so), are dogs with show and working titles.