I need a pre-teen chapter cover illustrator

This self-published book is set in the 1950s. It is about a ten-year-old boy and his dog's adventures growing up in southern Arizona's foothills of the Huachuca mountains. I have some stock photos to give an idea of the realistic landscape with an Indian boy and a dog that I imagine would be an attention-grabbing cover. The boy would wear jeans and a calico shirt, not a ceremonial first American outfit.