Humbled to be mentioned with these folks on the post, and you can find my shows at Grand Mesa Marching or at www.jasonnitsch.com
Thorndale HS just won Class 2A in San Antonio with "Western Sky Sketches," mine from GMM, and Rosebud-Lott placed 11th in 2A with an original show from me titled "Paradise." I also used to write every year for perennial 2A finalist Clifton HS when Keith Zuehlke was the director there, so I know the level very well!
While you are looking, I would suggest not just looking for a show, but looking for a partner and a collaborator for your program and your students. Once you find that, you'll never be searching again!
Best of Luck!