That's too easy I am afraid. I would love you to post the image you want to use so we can see what you have taken in a perfect environment. Then I would ask you to submit a shot taken specifically for the assignment. You have taken some excellent pictures to date and I have every confidence that you will find a suitable subject and create another great shot.
Call me pedantic but I feel it's important to take the photos for the projects as it makes you aware of following a specific brief.
Good luck, I am confident you will produce a fine image.