There are a number of sites out there with varying difficulty shows available. I have had great success and won medals with "off the shelf" shows int he scholastic arena.
The 2 I highly recommend are in order of preference:
VisAudio Designs: Can custom write a QUALITY show with *little wait time, purchase an existing show, etc.
www.visaudiodesigns.com email them and tell them I sent you their way and they will do you a great job! You can see some of their work on youtube (Imperial Percussion 2010, Clear Brook H.S., and a number of others). VA designers see the entire process through, even work up needed samples, narration, as well as provide very quick turn around on any changes/rewrites.
Marching Show Concepts: I used them with a school on a low budget. Low budget doesn't mean crappy show cause I have top 3'd in our class, 4 years in a row with their shows. If you contact them talk with David Bolzman he is an awesome guy and very helpful through out the entire season.
*Edit: when I say little wait time I mean they are very proficient about turn around time. I have had nightmares with writers and having to stay on them or deal with the never hear from them for 3 months. These guys are NOT like that.
_________________________
Jereme Robinson
Executive Director
Imperial Percussion Theater
Independent Open Percussion Group
www.imperialpercussion.orgTo be a member contact me for info