Centralized Greeting Prompts & Hold Messages

I would like to propose a way to make uploaded greeting prompts and messages availble to admins. While we can push out hold music and greeting settings to users via templates, I would like to see admins have the ability to make custom greetings, audio while waiting, and hold music available to select universally.

Once a custom greeting or hold message is uploaded by an admin, it would be a selectable option when updated Queues, extensions, and user accounts. For instance when editing a Queue greeting, under the "custom" option we could select company-wide greetings.

If not possible, at least expand the template concept to Queues and Extensions.