I have found a few old Kickstart projects, such as this, which consist of a case (not on-topic), containing a Real Time Clock and battery power for the Pi.
Some have a few extra features, such as a display, or solar power panel, etc.
Question: if I detail my requirements, would a question asking for such a thing be on topic?
Yes, that sounds on topic to me:
Hardware is any primarily electronic item that can perform more than one task, designed to interface with, connect to, or be, a primary computing platform in day-to-day operation.
A primary computing platform is any primarily electronic item that can perform meaningful tasks on its own with minimal external support, and designed to be operated by a user, consumer or professional.
This sounds a lot like a component in a desktop or laptop. It's a component designed to interface with the primary computing platform.
