make app only available in volume purchase store

I have a free app with an in-app purchase to unlock extra content. I'm trying to allow a school district to give all of its students the unlocked version of the app. Since IAPs are not something that can be unlocked through the volume purchase program, I was thinking I could create a separate, paid version of the app (with no IAP). But, if I have two versions of the app in the App Store, this could be confusing to other customers. Is there a way to make an app only visible in the volume purchase store? Or, can I make a custom app for educational institutes (similar to a custom B2B app)? Please let me know if you have any solutions. Thanks in advance!