Hi Melinda!
At WJHS we currently do one musical a year, and so far, we've used Broadway, Jr., because I really like the CD accompaniment. Sounds like you're looking for straight plays. I have some I've collected, though never put up, that you're welcome to borrow if you'd like. Try Dramatic Publishing - I spoke to a rep from them at AATE and they were really helpful and have lots to peruse.
Keep me posted!
Dinah