Illustrator for Book Cover - Teenage Boy

My teenage daughter, as part of a school project, has written a book for charity, she is going to crowdfund printing, donating any profits to a charity who educates under privileged children in India ([login to view URL]). Her book is about a ten year old boy named Luke Luck. Luke is not so lucky. The story sees him through a raft of misfortunes, generally involving a monkey. Luke meets the monkey as it steals Luke's banana. We would like a book cover illustration to fit the target audience of children 8 to 12. Luke has unruly dirty blond hair, which can’t be tamed. Eyes colour is blue/green/grey. He wears a t shirt and shorts. Ideally the monkey would be sitting on Luke's shoulder taunting him with a banana. This is a school project, we are short on time and funds. While credit may be provided for the work provided. Rights for the artwork will be assigned to us, i.e. the artist assigns copyright to us.